8444 + Interview Questions in Primary School in Physics Page 1 InterviewSolution

1.	1 kgf x 1 m = ___please tell me the answer
Answer» Answer: 9.80665 JOULES anwer Explanation: PLEASE mark me in brain LIST or FOLLOW me

1.

1 kgf x 1 m = ___please tell me the answer

Answer»

Answer:

9.80665 JOULES anwer

Explanation:

PLEASE mark me in brain LIST or FOLLOW me

Discussion

2.	Give two 2 xamples each for contact force and force at a distance
Answer» EXPLANATION: HOPE it will HELP you✨✨✨✨✨✨✨

2.

Give two 2 xamples each for contact force and force at a distance

Answer»

EXPLANATION:

HOPE it will HELP you✨✨✨✨✨✨✨

Discussion

3.	How can you differntitae between contact force and force at a distance
Answer» Answer: CONTACT force EVOLVE push pull and friction....,..... at a DISTANCE force when TWO interacting force xubuntu interacting object are not touching

3.

How can you differntitae between contact force and force at a distance

Answer»

Answer:

CONTACT force EVOLVE push pull and friction....,.....

at a DISTANCE force when TWO interacting force xubuntu interacting object are not touching

Discussion

4.	Gawain 2 panuto buuin ng flowchart sa ibaba dugtungan ito na mga pangyayari batay sa kwentong "ang sirena at si santiago" upang mabuo ang diwa.plss answer because need the answer plss
Answer» ANSWER: which LANGUAGE is it Explanation: have a GREAT DAY

4.

Gawain 2 panuto buuin ng flowchart sa ibaba dugtungan ito na mga pangyayari batay sa kwentong "ang sirena at si santiago" upang mabuo ang diwa.plss answer because need the answer plss

Answer»

ANSWER:

which LANGUAGE is it

Explanation:

have a GREAT DAY

Discussion

5.	What changes can be produced by a force
Answer» Answer: In physics, a force is any interaction that, when unopposed, will CHANGE the motion of an object. A force can cause an object with mass to change its velocity (which INCLUDES to begin moving from a state of rest), i.e., to ACCELERATE. Force can ALSO be described intuitively as a push or a pull. In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, POUNDAL, kip, kilopond In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, poundal, kip, kilopondSI unit: newton (N) In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, poundal, kip, kilopondSI unit: newton (N)In SI base units: kg·m/s2

5.

What changes can be produced by a force

Answer»

Answer:

In physics, a force is any interaction that, when unopposed, will CHANGE the motion of an object. A force can cause an object with mass to change its velocity (which INCLUDES to begin moving from a state of rest), i.e., to ACCELERATE. Force can ALSO be described intuitively as a push or a pull.

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, POUNDAL, kip, kilopond

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, poundal, kip, kilopondSI unit: newton (N)

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull.Other units: dyne, pound-force, poundal, kip, kilopondSI unit: newton (N)In SI base units: kg·m/s2

Discussion

6.	What is force what changes can be produced by a force
Answer» ANSWER: ..................................

6.

What is force what changes can be produced by a force

Answer»

ANSWER:

..................................

Discussion

7.	2 State an example for a situation mentioned below ina) changes the speed of an objectb) changes the shape of an orjac) changes the direction of an objectHow can you differentiate between a contact force and- Give two examples each for a contact force and a for5. Detect the errors in the following statement and rewicorrections."Because the car is at rest. so forces are acting on itWhy do tools meant for og always have sharp edg7. Objects change their state of moon due to the nextagree with this statement Discuss with examples. ASWhen you push a heavy object it doesn't move Expiaforce.(AS)2. If you push a bezvy box which is a set you mustmotion. However, once the box is sliding you can appthat motion. Why? (AS.. Find det forces from the following gum (AS)aho
Answer» Answer: Explanation: Gym em of a if sexy still MINUTES west CHI mill in HTC DESIRE Dr tub join

7.

2 State an example for a situation mentioned below ina) changes the speed of an objectb) changes the shape of an orjac) changes the direction of an objectHow can you differentiate between a contact force and- Give two examples each for a contact force and a for5. Detect the errors in the following statement and rewicorrections."Because the car is at rest. so forces are acting on itWhy do tools meant for og always have sharp edg7. Objects change their state of moon due to the nextagree with this statement Discuss with examples. ASWhen you push a heavy object it doesn't move Expiaforce.(AS)2. If you push a bezvy box which is a set you mustmotion. However, once the box is sliding you can appthat motion. Why? (AS.. Find det forces from the following gum (AS)aho

Answer»

Answer:

Explanation:

Gym em of a if sexy still MINUTES west CHI mill in HTC DESIRE Dr tub join

Discussion

8.	Thxxxxxxxxx friend.
Answer» ANSWER: YAA WELCOME DEAR .......

8.

Thxxxxxxxxx friend.

Answer»

ANSWER:

YAA WELCOME DEAR .......

Discussion

9.	Try to guess what song this is () bet you can't.
Answer» Explanation: 5603642259 password 123456 LOVE JOIN PLEASE join FAST GIRL

9.

Try to guess what song this is () bet you can't.

Answer»

Explanation:

5603642259 password 123456 LOVE JOIN PLEASE join FAST GIRL

Discussion

10.	9. A body of mass 70 kg, when completely immersed inwater, displaces 20,000 cm? of water. Find : (1) theweight of body in water.
Answer» Explanation: VOLUME of water displaced is 20000 cm^3 THEREFORE buoyant force = V ro g = 20000 × 1 × 10 dyne = 2 × 10^5 dyne = 2 N now WEIGHT of body in water = 70 g - 2 N = (700 - 2)N = 698 N

10.

9. A body of mass 70 kg, when completely immersed inwater, displaces 20,000 cm? of water. Find : (1) theweight of body in water.

Answer»

Explanation:

VOLUME of water displaced is 20000 cm^3

THEREFORE buoyant force = V ro g = 20000 × 1 × 10 dyne = 2 × 10^5 dyne = 2 N

now WEIGHT of body in water = 70 g - 2 N = (700 - 2)N = 698 N

Discussion

11.	Mention the name of a phenomenon which takes place when patterns are formed in kaleidoscope.
Answer» the PHENOMENON is REPEATED REFLECTION

Discussion

12.	derive mathematical expression to find the weight of an object on moon in comparison with that on earth
Answer» $\red{❣︎}$ $\huge{\mathtt{\blue{\underline{\underline{ANSWER}}}}}$ $\red{❣︎}$ We Know That , $\implies$ g = $\frac{GM}{R²}$ also , W = mg $\implies$ W = $\frac{GMm}{R²}$ Let , MASS of the object be m Its WEIGHT on moon be $W_m$ $\bf{Let \:the\: mass \:of \:Moon }$ = $M_m$ $\bf{And\: the \:Radius \:of \:moon}$ = $R_m$ Applying UNIVERSAL Law of Gravitation , weight of the obj. in moon will be $\longrightarrow$ $\implies {W_m}$ = G $\frac{M_m\:×\:m}{R_m²}$ ${\longrightarrow}$ $( <klux>1</klux> )$ Let the weight of the same obj. on earth be $W_e$ $\bf{Mass \:of \:earth \:is \:M}$ $\bf{Radius \:of \:earth\: is \:R}$ $\implies {W_e}$ = G $\frac{M\:×\:m}{R²}$ ${\longrightarrow}$ $( 2 )$ $\therefore$ ( 1 ) , ( 2 ) $\implies W_m$ = G $\frac{7.36\:×\:10²²\:kg\:×\:m}{( 1.76\:×\:10⁶\:m)²}$ $\implies W_m$ = $\bf{2.431 × 10¹⁰\: G × m}$ $\longrightarrow ( 3 )$ and $\implies W_e$ = $\bf{1.474 × 10¹¹\:G × m}$ $\longrightarrow ( 4 )$ $now ,$ $\huge{\frac{3}{4}}$ $\implies$ $\bold{\frac{W_m}{W_e}}$ = $\bold{\frac{2.431\:×\:10¹⁰}{1.474\:×\:10¹¹}}$ = 0.165 = $\bold{\frac{1}{6}}$ $\implies$ $\bold{\frac{Weight\:of\:obj\:in\:moon}{weight\:of\:obj\:in\:earth}}$ = $\bold{\frac{1}{6}}$ $\therefore$ $\sf{Weight\: of\:obj.\:in\:moon}$ = $\frac{1}{6}$ × $\sf{its\: weight\: on\: earth}$ $\boxed{\boxed{\boxed{\bf{PROVED}}}}$ $\blacksquare{\tiny{BY}}\blacksquare$ $\boxed{\boxed{\boxed{\mathbb{@\:LILY}}}}$

12.

derive mathematical expression to find the weight of an object on moon in comparison with that on earth

Answer»

$\red{❣︎}$ $\huge{\mathtt{\blue{\underline{\underline{ANSWER}}}}}$ $\red{❣︎}$

We Know That ,

$\implies$ g = $\frac{GM}{R²}$

also , W = mg

$\implies$ W = $\frac{GMm}{R²}$

Let , MASS of the object be m

Its WEIGHT on moon be $W_m$

$\bf{Let \:the\: mass \:of \:Moon }$ = $M_m$

$\bf{And\: the \:Radius \:of \:moon}$ = $R_m$

Applying UNIVERSAL Law of Gravitation , weight of the obj. in moon will be $\longrightarrow$

$\implies {W_m}$ = G $\frac{M_m\:×\:m}{R_m²}$ ${\longrightarrow}$ $( <klux>1</klux> )$

Let the weight of the same obj. on earth be $W_e$

$\bf{Mass \:of \:earth \:is \:M}$

$\bf{Radius \:of \:earth\: is \:R}$

$\implies {W_e}$ = G $\frac{M\:×\:m}{R²}$ ${\longrightarrow}$ $( 2 )$

$\therefore$ ( 1 ) , ( 2 )

$\implies W_m$ = G $\frac{7.36\:×\:10²²\:kg\:×\:m}{( 1.76\:×\:10⁶\:m)²}$

$\implies W_m$ = $\bf{2.431 × 10¹⁰\: G × m}$ $\longrightarrow ( 3 )$

and

$\implies W_e$ = $\bf{1.474 × 10¹¹\:G × m}$ $\longrightarrow ( 4 )$

$now ,$ $\huge{\frac{3}{4}}$

$\implies$ $\bold{\frac{W_m}{W_e}}$ = $\bold{\frac{2.431\:×\:10¹⁰}{1.474\:×\:10¹¹}}$ = 0.165 = $\bold{\frac{1}{6}}$

$\implies$ $\bold{\frac{Weight\:of\:obj\:in\:moon}{weight\:of\:obj\:in\:earth}}$ = $\bold{\frac{1}{6}}$

$\therefore$ $\sf{Weight\: of\:obj.\:in\:moon}$ = $\frac{1}{6}$ × $\sf{its\: weight\: on\: earth}$

$\boxed{\boxed{\boxed{\bf{PROVED}}}}$ $\blacksquare{\tiny{BY}}\blacksquare$ $\boxed{\boxed{\boxed{\mathbb{@\:LILY}}}}$

Discussion

13.	A rubber ball floats on water with its 1/3rd volumeoutside water. What is the density of rubber?
Answer» EXPLANATION: That is, the DENSITY of the RUBBER is (2/3) g/cm³.

13.

A rubber ball floats on water with its 1/3rd volumeoutside water. What is the density of rubber?

Answer»

EXPLANATION:

That is, the DENSITY of the RUBBER is (2/3) g/cm³.

Discussion

14.	Moving objects having energy in what kind of energy store
Answer» KINETIC ENERGY Kinetic energy is the energy POSSESSED by the OBJECT by VIRTUE of its motion.

14.

Moving objects having energy in what kind of energy store

Answer»

KINETIC ENERGY

Kinetic energy is the energy POSSESSED by the OBJECT by VIRTUE of its motion.

Discussion

15.	2. What is the name of the rock?=
Answer» Answer: PLEASE give the photo of the rock... Explanation: please mark me the branliest ALSO please follow me... Marry Christmas in advance...stay safe and HAPPY and HEALTHY... lots of LOVE for you and your family...❤️♥️

15.

2. What is the name of the rock?=

Answer»

Answer:

PLEASE give the photo of the rock...

Explanation:

please mark me the branliest ALSO please follow me...

Marry Christmas in advance...stay safe and HAPPY and HEALTHY...

lots of LOVE for you and your family...❤️♥️

Discussion

16.	State the characteristics of asexual reproduction.
Answer» Answer: only 1 parent is involved Only ONE parent is REQUIRED, unlike sexual reproduction which needs two parents. Since there is only one parent, there is no fusion of gametes and no mixing of GENETIC information. As a result, the offspring are GENETICALLY identical to the parent and to each other.

16.

State the characteristics of asexual reproduction.

Answer»

Answer:

only 1 parent is involved

Only ONE parent is REQUIRED, unlike sexual reproduction which needs two parents. Since there is only one parent, there is no fusion of gametes and no mixing of GENETIC information. As a result, the offspring are GENETICALLY identical to the parent and to each other.

Discussion

17.	Explain the process of identifying the focus of a diverging lens,with the help of a ray diagram.
Answer» ANSWER: explain the PROCESS of identifying the focus of a diverging LENS, with the help of RAY diagram

17.

Explain the process of identifying the focus of a diverging lens,with the help of a ray diagram.

Answer»

ANSWER:

explain the PROCESS of identifying the focus of a diverging LENS, with the help of RAY diagram

Discussion

18.	A light say prallel to the principal axis is incident on Bi-convex lence.show process of refraction with the help of ray diagram.
Answer» EXPLANATION: PRINCIPAL or first focus is the POINT from which incident rays after PASSING through convex LENS, become parallel to the principal axis.

18.

A light say prallel to the principal axis is incident on Bi-convex lence.show process of refraction with the help of ray diagram.

Answer»

EXPLANATION:

PRINCIPAL or first focus is the POINT from which incident rays after PASSING through convex LENS, become parallel to the principal axis.

Discussion

19.	Answer the following questions in breif:1. What is moment?2 What is pressure?.331B. Write the Sl and CGS units of the pressure. In4./Define atmospheric pressure.B.7 Why are dams over the rivers made wider at the base?BAWhy is it easier to cut the vegetables with a sharper knife?haWhy are the belts of school bags wider?8.Gon which two factors does the size of moment dependss
Answer» Answer: 1. A moment is a particular point in time. Some moments you REMEMBER forever: like the moment you earned your driver's license or the moment you learned that you passed your organic chemistry class. A moment is a short, but UNSPECIFIED, amount of time. 2. Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid. ... In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals. 3. The SI unit of pressure is Pascal (represented as Pa) which is EQUAL to one newton per square metre (N/m-2 or kg m-1s-2). 4. Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 INCHES Hg, or 14.696 psi. 5. The buildings and dams are made broader at the base than at the top just to decrease the pressure on the ground. 6. The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small. Thus, it is easier to cut with the former than with the latter. 7. Broad shoulder straps provide larger surface area. So, the pressure exerted by the bag on the shoulder is less and carrying the bad is easier. 8. The size of a moment depends on two factors: the size of the force applied. the perpendicular distance from the pivot to the line of ACTION of the force. *Follow* me

19.

Answer the following questions in breif:1. What is moment?2 What is pressure?.331B. Write the Sl and CGS units of the pressure. In4./Define atmospheric pressure.B.7 Why are dams over the rivers made wider at the base?BAWhy is it easier to cut the vegetables with a sharper knife?haWhy are the belts of school bags wider?8.Gon which two factors does the size of moment dependss

Answer»

Answer:

1. A moment is a particular point in time. Some moments you REMEMBER forever: like the moment you earned your driver's license or the moment you learned that you passed your organic chemistry class. A moment is a short, but UNSPECIFIED, amount of time.

2. Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid. ... In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals.

3. The SI unit of pressure is Pascal (represented as Pa) which is EQUAL to one newton per square metre (N/m-2 or kg m-1s-2).

4. Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 INCHES Hg, or 14.696 psi.

5. The buildings and dams are made broader at the base than at the top just to decrease the pressure on the ground.

6. The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small. Thus, it is easier to cut with the former than with the latter.

7. Broad shoulder straps provide larger surface area. So, the pressure exerted by the bag on the shoulder is less and carrying the bad is easier.

8. The size of a moment depends on two factors: the size of the force applied. the perpendicular distance from the pivot to the line of ACTION of the force.

Follow me

Discussion

20.	Keywordsthe force of attraction between molecules of the same kindCOHESIONthe force of attraction between different kinds of moleculesADHESIONMELTINGBOILINGEVAPORATIONchange of state of a substance from its solid state to its liquid statconstant temperaturechange of state of a substance from its liquid state to its gaseoconstant temperaturechange of state of a substance from its liquid state to its gaseits melting pointchange of state of a substance from its solid state directly tchange of state of a substance from its gaseous state to itchange of state of a substance from its liquid state to itsSUBLIMATIONCONDENSATIONFREEZINGEOExercisesA. Tick the most appropriate answer.1. Molecules of a solidb. move only whtheir nositions.
Answer» ANSWER: HEY i don't KNOW the answer but really by seeing your PHOTO i just love you

20.

Keywordsthe force of attraction between molecules of the same kindCOHESIONthe force of attraction between different kinds of moleculesADHESIONMELTINGBOILINGEVAPORATIONchange of state of a substance from its solid state to its liquid statconstant temperaturechange of state of a substance from its liquid state to its gaseoconstant temperaturechange of state of a substance from its liquid state to its gaseits melting pointchange of state of a substance from its solid state directly tchange of state of a substance from its gaseous state to itchange of state of a substance from its liquid state to itsSUBLIMATIONCONDENSATIONFREEZINGEOExercisesA. Tick the most appropriate answer.1. Molecules of a solidb. move only whtheir nositions.

Answer»

ANSWER:

HEY i don't KNOW the answer but really by seeing your PHOTO i just love you

Discussion

21.	Compute the weight of a body on earth whose mass is 25 kg
Answer» Answer: 9Mass of a BODY is 25 kg. What is its weight in Newton on earth? The body is carried to a planet whose mass is two TIMES ... brainly.in/question/2017816?utm_source=android&utm_medium=share&utm_campaign=question

21.

Compute the weight of a body on earth whose mass is 25 kg

Answer»

Answer:

9Mass of a BODY is 25 kg. What is its weight in Newton on earth? The body is carried to a planet whose mass is two TIMES ...

brainly.in/question/2017816?utm_source=android&utm_medium=share&utm_campaign=question

Discussion

22.	Pl help me if you know I'll mark you braniest
Answer» ANSWER: C) 85000g d) 44×5 = 220

22.

Pl help me if you know I'll mark you braniest

Answer»

ANSWER:

C) 85000g

d) 44×5 = 220

Discussion

23.	What will be the distance and displacement of a body moving on a circular track of length 300m and coming back to its initial position. *
Answer» Answer: distance = 300 m displacement = 0 Explanation: distance is the total distance COVERED by the object so its 300m :) displace is the SHORTEST distance from the initial position to the final position. here the initial and the final position is same so the displacement is 0. Hope it HELPS u!! BRAINLIEST PLS???

23.

What will be the distance and displacement of a body moving on a circular track of length 300m and coming back to its initial position. *

Answer»

Answer:

distance = 300 m

displacement = 0

Explanation:

distance is the total distance COVERED by the object so its 300m :)

displace is the SHORTEST distance from the initial position to the final position.

here the initial and the final position is same so the displacement is 0.

Hope it HELPS u!!

BRAINLIEST PLS???

Discussion

24.	If an object has a density of 2.5 g/cc and you immersed it into water, will it sink or float?
Answer» ANSWER: HELLO I am NEW in BRAINLY

24.

If an object has a density of 2.5 g/cc and you immersed it into water, will it sink or float?

Answer»

ANSWER:

HELLO I am NEW in BRAINLY

Discussion

25.	Define uniform speed in short answer.
Answer» Answer: In mathematics and PHYSICS, if an object is traveling in such a way that it covers the same DISTANCE for each INTERVAL of time it is traveling, then it is SAID to be traveling with uniform SPEED.

25.

Define uniform speed in short answer.

Answer»

Answer:

In mathematics and PHYSICS, if an object is traveling in such a way that it covers the same DISTANCE for each INTERVAL of time it is traveling, then it is SAID to be traveling with uniform SPEED.

Discussion

26.	Define velocity, acceleration and speed ??
Answer» $\large{\underline{\underline{\pmb{\sf{\color{yellow}{Answer:}}}}}}$ *VELOCITY is speed in a GIVEN direction. Acceleration is change in velocity divided by time. MOVEMENT can be SHOWN in distance-time and velocity-time graphs.* Explanation: $\small{\color{red}{\fbox{\textsf{\textbf{@ItzSongLover}}}}}$

26.

Define velocity, acceleration and speed ??

Answer»

$\large{\underline{\underline{\pmb{\sf{\color{yellow}{Answer:}}}}}}$

VELOCITY is speed in a GIVEN direction. Acceleration is change in velocity divided by time. MOVEMENT can be SHOWN in distance-time and velocity-time graphs.

Explanation:

$\small{\color{red}{\fbox{\textsf{\textbf{@ItzSongLover}}}}}$

Discussion

27.	What is the relationship between numerical value and unit
Answer» ANSWER: utzhzhfgzhgygpgugofyr to NAHE MI sagitl र

27.

What is the relationship between numerical value and unit

Answer»

ANSWER:

utzhzhfgzhgygpgugofyr to NAHE MI sagitl र

Discussion

28.	A train is moving at a velocity of 25 m/s. It is brought to rest by applyingthe brakes which produces a uniform retardation of 0.5m/s2 . Calculatea) The velocity of the train after 10 s.b) If the mass of the train is 20,000 kg then calculate the force requiredto stop the train.
Answer» EXPLANATION: I have EXPLAINED in the pic may it HELPS you

28.

A train is moving at a velocity of 25 m/s. It is brought to rest by applyingthe brakes which produces a uniform retardation of 0.5m/s2 . Calculatea) The velocity of the train after 10 s.b) If the mass of the train is 20,000 kg then calculate the force requiredto stop the train.

Answer»

EXPLANATION:

I have EXPLAINED in the pic

may it HELPS you

Discussion

29.	_ E _ U _ _ Twho will guess the word right I will mark him brainlest
Answer» answer- it can be NEBULA,I THINK so because it can be ANYTHING but my BRAIN SAYS it should be nebula only

29.

_ E _ U _ _ Twho will guess the word right I will mark him brainlest

Answer»

answer-

it can be NEBULA,I THINK so because it can be ANYTHING but my BRAIN SAYS it should be nebula only

Discussion

30.	Definition of inertia and it's SI unit
Answer» Answer: + EXPLANATION: Moment of inertia is defined as the tendency of an object to REMAIN in a STATE of rest or of a constant rotational velocity. Greater the moment of inertia, more torque is required to change this state. Torque in rotational motion plays the same role as force in linear motion. Its SI UNIT is kg. metre2. Hope the answer is helpful

30.

Definition of inertia and it's SI unit

Answer»

Answer:

+

EXPLANATION:

Moment of inertia is defined as the tendency of an object to REMAIN in a STATE of rest or of a constant rotational velocity. Greater the moment of inertia, more torque is required to change this state. Torque in rotational motion plays the same role as force in linear motion. Its SI UNIT is kg. metre2.

Hope the answer is helpful

Discussion

31.	Which of the following statement is not true ?A.Friction can be reduced by converting sliding friction into rolling frictionB. Friction in air and water can be reduced by streamlining the shape of the objects.C.A polished surface will have less frictionD.Friction can be reduced to zero
Answer» CORRECT option is D Friction can be reduced to zero We can REDUCE the friction between two surface by polishing the surface, by converting the shape of body like rolling friction is less than SLIDING friction so we can use tyres in PLACE of sliding the object. Friction can be minimized but cannot reduced to zero. Option D is not TRUE.

31.

Which of the following statement is not true ?A.Friction can be reduced by converting sliding friction into rolling frictionB. Friction in air and water can be reduced by streamlining the shape of the objects.C.A polished surface will have less frictionD.Friction can be reduced to zero

Answer»

CORRECT option is

D

Friction can be reduced to zero

We can REDUCE the friction between two surface by polishing the surface, by converting the shape of body like rolling friction is less than SLIDING friction so we can use tyres in PLACE of sliding the object.

Friction can be minimized but cannot reduced to zero.

Option D is not TRUE.

Discussion

32.	An empty density bottle is 20 g, when filled with water is 30g, when filled with a dense liquid is 60g. Find RD of liquid.
Answer» Answer: Mass of empty DENSITY BOTTLE, M1 = 30 grams MAss of bottle and WATER, M2 = 75 grams Mass of liquid and liquid x, M3 = 65 grams Mass of water = M2 – M1 = 45 grams a) Volume of density bottle = Mass of water = 45 grams b) Density of liquid x, D = mass of liquid/mass of water = 35/45 Mass of iquid = M3 – M1 = 65 – 30 = 35 grams D = Mass of liquid/mass of water = 35/45 = 0.77 grams/cm3 c) Mass of water in the density bottle = 75 – 30 = 45 grams Therefore, the volume of water in density bottle = 45 cc Mass of the liquid whose volume is equal to the density bottle = 65 – 30 = 35 grams Therefore, RELATIVE density of the liquid = mass of 45 cc of liquid/mass of 45 cc of water = 35/45 = 7/9 = 0.77 Explanation:

32.

An empty density bottle is 20 g, when filled with water is 30g, when filled with a dense liquid is 60g. Find RD of liquid.

Answer»

Answer:

Mass of empty DENSITY BOTTLE, M1 = 30 grams

MAss of bottle and WATER, M2 = 75 grams

Mass of liquid and liquid x, M3 = 65 grams

Mass of water = M2 – M1 = 45 grams

a) Volume of density bottle = Mass of water = 45 grams

b) Density of liquid x, D = mass of liquid/mass of water = 35/45

Mass of iquid = M3 – M1 = 65 – 30 = 35 grams

D = Mass of liquid/mass of water = 35/45 = 0.77 grams/cm3

c) Mass of water in the density bottle = 75 – 30 = 45 grams

Therefore, the volume of water in density bottle = 45 cc

Mass of the liquid whose volume is equal to the density bottle = 65 – 30 = 35 grams

Therefore, RELATIVE density of the liquid = mass of 45 cc of liquid/mass of 45 cc of water = 35/45 = 7/9 = 0.77

Explanation:

Discussion

33.	Friction depends on the ___________ of surfaces.
Answer» Answer: Friction does not depend on the amount of surface area in contact between the moving bodies or (WITHIN CERTAIN limits) on the relative speed of the bodies. It does, HOWEVER, depend on the magnitude of the FORCES holding the bodies together.

33.

Friction depends on the ___________ of surfaces.

Answer»

Answer:

Friction does not depend on the amount of surface area in contact between the moving bodies or (WITHIN CERTAIN limits) on the relative speed of the bodies. It does, HOWEVER, depend on the magnitude of the FORCES holding the bodies together.

Discussion

34.	The mass of the goods lorry is 4000 kg and the mass of goods loaded on it is 20000 kg. If the lorry is moving with a velocity of 2 metre per second what will be its momentum ?
Answer» Answer: GIVEN VELOCITY v = 2 m/s Mass of lorry = 4000 kg Mass of goods on the lorry = 20000 kg Therefore Total mass m on the lorry = 4000 kg + 20000 kg = 24000 kg Momentum p = ? We know that Momentum p = Mass m × Velocity v Therefore p = 24000 kg × 2 m/s Or p = 48000 kg m/s THUS the momentum of the lorry = 48000 kg m/s. Explanation: pls mark me brainest

34.

The mass of the goods lorry is 4000 kg and the mass of goods loaded on it is 20000 kg. If the lorry is moving with a velocity of 2 metre per second what will be its momentum ?

Answer»

Answer:

GIVEN VELOCITY v = 2 m/s Mass of lorry = 4000 kg Mass of goods on the lorry = 20000 kg Therefore Total mass m on the lorry = 4000 kg + 20000 kg = 24000 kg Momentum p = ? We know that Momentum p = Mass m × Velocity v Therefore p = 24000 kg × 2 m/s Or p = 48000 kg m/s THUS the momentum of the lorry = 48000 kg m/s.

Explanation:

pls mark me brainest

Discussion

35.	If we will break the glass of bulb will it still glow
Answer» Answer: YES Explanation: if we break the glass of bulb firstly CHECK that the FILAMENT is safe , if filament is not safe that MEANS bulb will not glow.

35.

If we will break the glass of bulb will it still glow

Answer»

Answer:

YES

Explanation:

if we break the glass of bulb firstly CHECK that the FILAMENT is safe , if filament is not safe that MEANS bulb will not glow.

Discussion

36.	Current flowing through the battery is
Answer» ANSWER: mzxavvfioa welcome join Explanation: mzxavvfioa welcome join

36.

Current flowing through the battery is

Answer»

ANSWER:

mzxavvfioa

welcome

join

Explanation:

mzxavvfioa

welcome

join

Discussion

37.	when light ray enters from an optically denser medium to an optically rarer medium it bends away from normal and DIAGRAM
Answer» Answer: For optically denser medium, refractive index n1 is greater than that of the rarer medium n2. Thus, the ANGLE of refraction has to be greater than angle of incidence i.e. it BENDS AWAY from the normal.

37.

when light ray enters from an optically denser medium to an optically rarer medium it bends away from normal and DIAGRAM

Answer»

Answer:

For optically denser medium, refractive index n1 is greater than that of the rarer medium n2. Thus, the ANGLE of refraction has to be greater than angle of incidence i.e. it BENDS AWAY from the normal.

Discussion

38.	what will happen to the velocity if manoj changes both the speed and direction of the bike while riding bike on turning road ?
Answer» ANSWER: No, the speed and velocity will not be the same. While TURNING, DIRECTION of MOTION changes. ... HENCE, speed will not be the same as velocity.

38.

what will happen to the velocity if manoj changes both the speed and direction of the bike while riding bike on turning road ?

Answer»

ANSWER:

No, the speed and velocity will not be the same. While TURNING, DIRECTION of MOTION changes. ... HENCE, speed will not be the same as velocity.

Discussion

39.	2. Name the following: - a) A solid that can compressed b) A hard solid c) A solid that can be stretched
Answer» ANSWER: a) RUBBER Ball b) Table C) Rubber BAND

39.

2. Name the following: - a) A solid that can compressed b) A hard solid c) A solid that can be stretched

Answer»

ANSWER:

a) RUBBER Ball

b) Table

C) Rubber BAND

Discussion

40.	Name the two forms of mechanical energy and also define them. Give 3 examples in this case.
Answer» Answer: kinetic energy and potential energy sum of kinetic and potential energy is mechanical energy and it is always constant and SI UNIT is joule. Potential Energy (PE) KE is the energy possessed by an object by VIRTUE of it being in motion. PE is the energy possessed by an object by virtue of its position. It can be transferred from one object to another and this happens during collision. When the APPLE is descending, its potential energy has BECOME kinetic energy, which is the energy of motion. Kinetic energy is the energy a person or an object has due to its motion — in this example, the falling apple. Explanation: PLZ mark me as brainleist.

40.

Name the two forms of mechanical energy and also define them. Give 3 examples in this case.

Answer»

Answer:

kinetic energy and potential energy

sum of kinetic and potential energy is mechanical energy and it is always constant and SI UNIT is joule. Potential Energy (PE) KE is the energy possessed by an object by VIRTUE of it being in motion. PE is the energy possessed by an object by virtue of its position. It can be transferred from one object to another and this happens during collision. When the APPLE is descending, its potential energy has BECOME kinetic energy, which is the energy of motion. Kinetic energy is the energy a person or an object has due to its motion — in this example, the falling apple.

Explanation:

PLZ mark me as brainleist.

Discussion

41.	What is Constellation????
Answer» Answer: a group of STARS FORMING a recognizable PATTERN that is traditionally named after its APPARENT form or identified with a mythological figure. Explanation: Mark as Brainliest❣️ (ﾐዎ ﻌ ዎﾐ)ﾉ

41.

What is Constellation????

Answer»

Answer:

a group of STARS FORMING a recognizable PATTERN that is traditionally named after its APPARENT form or identified with a mythological figure.

Explanation:

Mark as Brainliest❣️ (ﾐዎ ﻌ ዎﾐ)ﾉ

Discussion

42.	II. ANSWER THE FOLLOWING: 8. What is Perihelion and Aphelion position of earth?
Answer» ANSWER: APHELION is the point of the Earth's orbit that is FARTHEST AWAY from the Sun. PERIHELION is the point of the Earth's orbit that is nearest to the Sun.

42.

II. ANSWER THE FOLLOWING: 8. What is Perihelion and Aphelion position of earth?

Answer»

ANSWER:

APHELION is the point of the Earth's orbit that is FARTHEST AWAY from the Sun. PERIHELION is the point of the Earth's orbit that is nearest to the Sun.

Discussion

43.	I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?
Answer» ANSWER: oxygen and CYCLONE EXPLANATION: hope you understands the answer of

43.

I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?

Answer»

ANSWER:

oxygen and CYCLONE

EXPLANATION:

hope you understands the answer of

Discussion

44.	What is -1-) Total displacement of A2-) Total displacement of B3-) Acceleration of A4-) Acceleration of B
Answer» ANSWER: a) displacement = velocity × time displacement = 40 m b) 10× 10= 100m 3) a = CHANGE in velocity/ time = 0.4 m s-2 4) 10/10= 1 m s-2

44.

What is -1-) Total displacement of A2-) Total displacement of B3-) Acceleration of A4-) Acceleration of B

Answer»

ANSWER:

a) displacement = velocity × time

displacement = 40 m

b) 10× 10= 100m

3) a = CHANGE in velocity/ time

= 0.4 m s-2

4) 10/10= 1 m s-2

Discussion

45.	Why do we measure something? Write in 4 points.
Answer» EXPLANATION: Measurement is the action of MEASURING something. It plays an important ROLE in our lives, as we need to measure many things from time to time. If we have to travel to some place, we need to know exactly how far it is, so that we can decide the mode of transport to be used. The length between the two points, i.e. where we are right now and where we want to reach is called the distance between those points (places). Apart from measuring distance, there are also times when we need to measure length or width of an object, for EXAMPLE carpenters measure furniture to know how much material they would need to CONSTRUCT it.

45.

Why do we measure something? Write in 4 points.

Answer»

EXPLANATION:

Measurement is the action of MEASURING something. It plays an important ROLE in our lives, as we need to measure many things from time to time.

If we have to travel to some place, we need to know exactly how far it is, so that we can decide the mode of transport to be used. The length between the two points, i.e. where we are right now and where we want to reach is called the distance between those points (places).

Apart from measuring distance, there are also times when we need to measure length or width of an object, for EXAMPLE carpenters measure furniture to know how much material they would need to CONSTRUCT it.

Discussion

46.	Average Value Of earth density
Answer» Answer: 5.51 g/cm³ Image result for AVERAGE Value Of EARTH density Gravity: 9.807 m/s² Radius: 6,371 KM

46.

Average Value Of earth density

Answer»

Answer:

5.51 g/cm³

Image result for AVERAGE Value Of EARTH density

Gravity: 9.807 m/s²

Radius: 6,371 KM

Discussion

47.	What is the electrical induction? How do we get charge by induction?
Answer» Answer: There are a variety of methods to charge an object. ONE method is KNOWN as induction. In the induction process, a charged object is brought near but not TOUCHED to a neutral CONDUCTING object. The presence of a charged object near a neutral conductor will force (or induce) ELECTRONS within the conductor to move.

47.

What is the electrical induction? How do we get charge by induction?

Answer»

Answer:

There are a variety of methods to charge an object. ONE method is KNOWN as induction. In the induction process, a charged object is brought near but not TOUCHED to a neutral CONDUCTING object. The presence of a charged object near a neutral conductor will force (or induce) ELECTRONS within the conductor to move.

Discussion

48.	Metals and non metals 1. Prepare Index cards for any 2 metals and 2 Non metals with pictures. On these cards enter the deposits found in India It's Physical properties Chemical Properties Collect information on exceptional cases for physical properties of metals and non-metals v) Uses Instructions: .prepare separate card for each one . Use Colour A4 sheets.Use half sheet for each metal and non metals some please do this activity and send me the pic it is so important for me
Answer» Answer: metals and non metals 1. Prepare INDEX cards for any 2 metals and 2 Non metals with pictures. On these cards enter the deposits found in India It's Physical properties Chemical Properties Collect information on exceptional cases for physical properties of metals and non-metals v) Uses Instructions: .prepare separate card for each one . Use COLOUR A4 sheets. Use half sheet for each metal and non metals some please do this activity and send me the PIC it is so IMPORTANT for me

48.

Metals and non metals 1. Prepare Index cards for any 2 metals and 2 Non metals with pictures. On these cards enter the deposits found in India It's Physical properties Chemical Properties Collect information on exceptional cases for physical properties of metals and non-metals v) Uses Instructions: .prepare separate card for each one . Use Colour A4 sheets.Use half sheet for each metal and non metals some please do this activity and send me the pic it is so important for me

Answer»

Answer:

metals and non metals 1. Prepare INDEX cards for any 2 metals and 2 Non metals with pictures. On these cards enter the deposits found in India It's Physical properties Chemical Properties Collect information on exceptional cases for physical properties of metals and non-metals v) Uses Instructions: .prepare separate card for each one . Use COLOUR A4 sheets.

Use half sheet for each metal and non metals

some please do this activity and send me the PIC

it is so IMPORTANT for me

Discussion

49.	Convert 2.835 gram force to newton
Answer» Answer: 2.835 GRAM force = 0.02780185275 NEWTON Explanation: 1 gram-force to newton = 0.00981 newton PLZ MARK ME AS BRAINLIEST IF I HELPED YOU :-)

49.

Convert 2.835 gram force to newton

Answer»

Answer:

2.835 GRAM force = 0.02780185275 NEWTON

Explanation:

1 gram-force to newton = 0.00981 newton

PLZ MARK ME AS BRAINLIEST IF I HELPED YOU

:-)

Discussion

50.	Find the frequency of vibration of an object is vibrating 600 times in 12 seconds.
Answer» ANSWER: F= no.of vibration/time Explanation: f=600/12 f= 50HZ

50.

Find the frequency of vibration of an object is vibrating 600 times in 12 seconds.

Answer»

ANSWER:

F= no.of vibration/time

Explanation:

f=600/12

f= 50HZ

Discussion

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