67486 + Interview Questions in Secondary School in Physics Page 5 InterviewSolution

201.	What are the law laws of reflection do all reflectance of surface obey the laws of reflection?
Answer» ANSWER: laws of REFLECTION are: 1.ANGLE of incidence is equal to angle of reflection 2.normal,incident ray and reflected ray LIE in the same plane. Yes all surfaces FOLLOW the law of reflection but not all surfaces reflect light.

201.

What are the law laws of reflection do all reflectance of surface obey the laws of reflection?

Answer»

ANSWER:

laws of REFLECTION are:

1.ANGLE of incidence is equal to angle of reflection

2.normal,incident ray and reflected ray LIE in the same plane.

Yes all surfaces FOLLOW the law of reflection but not all surfaces reflect light.

Discussion

202.	Phy 9 th motion plz
Answer» ANSWER: A 1600 ms^-2 please MARK BRAINLIEST

202.

Phy 9 th motion plz

Answer»

ANSWER:

A 1600 ms^-2

please MARK BRAINLIEST

Discussion

203.	I I find the angle between the vectores Ã =2i- uj +6k and B = 31+j+2k
Answer» ANSWER: MAYBE 8193469¹²m ooooooooooooo

203.

I I find the angle between the vectores Ã =2i- uj +6k and B = 31+j+2k

Answer»

ANSWER:

MAYBE 8193469¹²m ooooooooooooo

Discussion

204.	(v) What will be the relativistic speed and momentum of the particleif relativistic mass of the particle will be doubled than the rest mass?
Answer» ANSWER: xuzbzjxbsjbsisbs Explanation: bsjbs hibd zkbzkzbxkbxkxbxkzbxjsohs bisbisbosh

204.

(v) What will be the relativistic speed and momentum of the particleif relativistic mass of the particle will be doubled than the rest mass?

Answer»

ANSWER:

xuzbzjxbsjbsisbs

Explanation:

bsjbs

hibd

zkbzkzbxkbxkxbxkzbxjsohs bisbisbosh

Discussion

205.	Principle of sports training does not include?
Answer» ANSWER: Training means ENGAGING in activity to improve performance and/or fitness; this is best accomplished by UNDERSTANDING general sports

205.

Principle of sports training does not include?

Answer»

ANSWER:

Training means ENGAGING in activity to improve performance and/or fitness; this is best accomplished by UNDERSTANDING general sports

Discussion

206.	What is atmosphere????
Answer» Answer: An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is HELD in place by the gravity of that body. An atmosphere is more likely to be retained if the gravity it is SUBJECT to is HIGH and the TEMPERATURE of the atmosphere is low. Gm

206.

What is atmosphere????

Answer»

Answer:

An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is HELD in place by the gravity of that body. An atmosphere is more likely to be retained if the gravity it is SUBJECT to is HIGH and the TEMPERATURE of the atmosphere is low.

Gm

Discussion

207.	A partical moves in the x-y plane according to the scheme x = -8 sinπt and y = -2 cos²πt, where t is time. Find the equation of path of the particle.DONT SPAM IF YOU SPAM I WILL REPORT YOUR 25 ANSWERS
Answer» $\blue{\Large{\boxed{\tt{ \red{Solution:- }}}}}$ $\dashrightarrow$ $\tt{y = -<klux>2</klux>\cos^{2}\pi t}$ $\dashrightarrow$ $\tt{y = -2(\cos^{2}\pi t-\sin^{2}\pi t)}$ $\dashrightarrow$ $\tt{y = 1-2\sin^{2}\pi t ---(1)}$ Now, $\dashrightarrow$ $\tt{x = -8\sin\pi t}$ $\dashrightarrow$ $\tt{\sin\pi t = \frac{-x}{8}---(2)}$ Putting the value of $\sf{eq^{n}}$ (2)in $\sf{eq^{n}}$ (1) we'll GET, $\green\rightarrowtail$ $\sf{y = - 2 \{1 - 2( \frac{ - x}{8})^{2} \}}$ $\green\rightarrowtail$ $\sf{y = - 2(1 - \frac{2x ^{2} }{64})}$ $\green\rightarrowtail$ $\sf{y = - 2 + \frac{4x^{2} }{64}}$ $\green\rightarrowtail$ $\sf{y = \frac{x^2}{16} -2}$ $\green\rightarrowtail$ $\sf{\frac{x^2}{16}-2 = 0}$ $\green\rightarrowtail$ $\sf{x^2 = 2×16}$ $\green\rightarrowtail$ $\sf{x =\sqrt{32}}$ $\green\rightarrowtail$ $\sf\boxed{x =\pm4\sqrt{2}}$ Identities used:- $\purple\mapsto$ $\rm{\cos2\theta= \cos^2- \sin^2\theta}$ $\purple\mapsto$ $\rm{\sin^2\theta+\cos^2\theta= 1}$ NOTE:- for the FIGURE you may REFER to the attachment. Hope it helps :)

207.

A partical moves in the x-y plane according to the scheme x = -8 sinπt and y = -2 cos²πt, where t is time. Find the equation of path of the particle.DONT SPAM IF YOU SPAM I WILL REPORT YOUR 25 ANSWERS

Answer»

$\blue{\Large{\boxed{\tt{ \red{Solution:- }}}}}$

$\dashrightarrow$ $\tt{y = -<klux>2</klux>\cos^{2}\pi t}$

$\dashrightarrow$ $\tt{y = -2(\cos^{2}\pi t-\sin^{2}\pi t)}$

$\dashrightarrow$ $\tt{y = 1-2\sin^{2}\pi t ---(1)}$

Now,

$\dashrightarrow$ $\tt{x = -8\sin\pi t}$

$\dashrightarrow$ $\tt{\sin\pi t = \frac{-x}{8}---(2)}$

Putting the value of $\sf{eq^{n}}$ (2)in $\sf{eq^{n}}$ (1)

we'll GET,

$\green\rightarrowtail$ $\sf{y = - 2 \{1 - 2( \frac{ - x}{8})^{2} \}}$

$\green\rightarrowtail$ $\sf{y = - 2(1 - \frac{2x ^{2} }{64})}$

$\green\rightarrowtail$ $\sf{y = - 2 + \frac{4x^{2} }{64}}$

$\green\rightarrowtail$ $\sf{y = \frac{x^2}{16} -2}$

$\green\rightarrowtail$ $\sf{\frac{x^2}{16}-2 = 0}$

$\green\rightarrowtail$ $\sf{x^2 = 2×16}$

$\green\rightarrowtail$ $\sf{x =\sqrt{32}}$

$\green\rightarrowtail$ $\sf\boxed{x =\pm4\sqrt{2}}$

Identities used:-

$\purple\mapsto$ $\rm{\cos2\theta= \cos^2- \sin^2\theta}$

$\purple\mapsto$ $\rm{\sin^2\theta+\cos^2\theta= 1}$

NOTE:- for the FIGURE you may REFER to the attachment.

Hope it helps :)

Discussion

208.	If the volume of a parallelepiped whose coterminous edges are given by the vectors vec a=hat i+hat j+nhat k vec b=2i+4j-nhat k and vec c=hat i+hat j+3hat k(n>=0) is 158 cu.Units then
Answer» Answer: Search for questions, POSTS and chapters Maths Bookmark Let the VOLUME of a parallelopiped whose coterminous edges are given by u = i ^ + j ^ +λ K ^ , v = i ^ + j ^ +3 k ^ and w =2 i ^ + j ^ + k ^ be 1cu. UNITS. If θ be the angle between the edge u and w , then cosθ can be: share Share Answer Correct option is D 6 3 7 Given, u = i ^ + j ^ +λ k ^ , v = i ^ + j ^ +3 k ^ w =2 i ^ + j ^ + k ^ Volume of parallelopied =u.( v × w )=[ u v w ] = ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣ 1 1 2 1 1 1 λ λ 1 ∣ ∣ ∣ ∣ ∣ ∣ ∣ ∣ =1(1−3)−1(1−6)+λ(1−2)−2+5+(−λ)3−λ so, Given volume =±1 taking (+) sign 3−λ=1 λ=2 Angle between u and w cosθ= ∣ u ∣.∣ w ∣ u . w = 1+1+4 . 4+1+1 (i+j+2k).(2i+j+k) = 5 . 5 2+1+2 = 5 5 =1 Taking (−) sign 3−λ=−1 λ=4 u = i ^ + j ^ +4 k ^ w =2i+j+ k ^ cosθ= ∣ u ∣∣ w ∣ u . w = 1+1+16 4+1+1 ( i ^ + j ^ +4 k ^ ).(2i+j+k) = 18 6 2+1+4 = 6 3 ....Answer

208.

If the volume of a parallelepiped whose coterminous edges are given by the vectors vec a=hat i+hat j+nhat k vec b=2i+4j-nhat k and vec c=hat i+hat j+3hat k(n>=0) is 158 cu.Units then

Answer»

Answer:

Search for questions, POSTS and chapters

Maths

Bookmark

Let the VOLUME of a parallelopiped whose coterminous edges are given by

u

=

i

^

+

j

^

+λ

K

^

,

v

=

i

^

+

j

^

+3

k

^

and

w

=2

i

^

+

j

^

+

k

^

be 1cu. UNITS. If θ be the angle between the edge

u

and

w

, then cosθ can be:

share

Share

Answer

Correct option is

D

6

3

7

Given,

u

=

i

^

+

j

^

+λ

k

^

,

v

=

i

^

+

j

^

+3

k

^

w

=2

i

^

+

j

^

+

k

^

Volume of parallelopied =u.(

v

×

w

)=[

u

v

w

]

=

∣

1

2

1

λ

1

∣

=1(1−3)−1(1−6)+λ(1−2)−2+5+(−λ)3−λ

so,

Given volume =±1 taking (+) sign

3−λ=1

λ=2

Angle between

u

and

w

cosθ=

∣

u

∣.∣

w

∣

u

.

w

=

1+1+4

.

4+1+1

(i+j+2k).(2i+j+k)

=

5

.

5

2+1+2

=

5

=1

Taking (−) sign

3−λ=−1

λ=4

u

=

i

^

+

j

^

+4

k

^

w

=2i+j+

k

^

cosθ=

∣

u

∣∣

w

∣

u

.

w

=

1+1+16

4+1+1

(

i

^

+

j

^

+4

k

^

).(2i+j+k)

=

18

6

2+1+4

=

6

3

....Answer

Discussion

209.	Time period of simple time pendulum is 0.5 seconds its oscillation frequency is
Answer» Answer: 5Hz Explanation: F=1/0.2=5Hz please MARK US BRAINLIST

209.

Time period of simple time pendulum is 0.5 seconds its oscillation frequency is

Answer»

Answer:

5Hz

Explanation:

F=1/0.2=5Hz

please MARK US BRAINLIST

Discussion

210.	A car starting from rest travelled with a speed of 27m/s in 3s.Find the acceleration of the body
Answer» Answer: 9m/square Explanation: a= v-u/t 27-0/3 9m/square

210.

A car starting from rest travelled with a speed of 27m/s in 3s.Find the acceleration of the body

Answer»

Answer:

9m/square

Explanation:

a= v-u/t

27-0/3

9m/square

Discussion

211.	IS third equation of motion 2aS=vf^2-Vi^2 dimensionally correct? Give solution.
Answer» Answer: 57^Sa2 sorry I didn't KNOW

211.

IS third equation of motion 2aS=vf^2-Vi^2 dimensionally correct? Give solution.

Answer»

Answer:

57^Sa2

sorry I didn't KNOW

Discussion

212.	In circuit, current becomes half when resistance isa.removed b.doubled c.halved d.none of these
Answer» ANSWER: RESISTANCE and CURRENT are two INVERSELY proportional value where if curent will be double then Resistance will be halfed and if current is halfed then resistance will be doubled. Explanation: doubled

212.

In circuit, current becomes half when resistance isa.removed b.doubled c.halved d.none of these

Answer»

ANSWER:

RESISTANCE and CURRENT are two INVERSELY proportional value where if curent will be double then Resistance will be halfed and if current is halfed then resistance will be doubled.

Explanation:

doubled

Discussion

213.	Give one word for the following : The phenomenon due to which we can judge depth.
Answer» ANSWER: here is your answer of your QUESTION HOPE it

213.

Give one word for the following : The phenomenon due to which we can judge depth.

Answer»

ANSWER:

here is your answer of your QUESTION HOPE it

Discussion

214.	The acceleration of an object is defined as. (1) = − (2) = + (3) = − (4)
Answer» Answer: 6-5=2 @#$_&-+() /*"':;!?

214.

The acceleration of an object is defined as. (1) = − (2) = + (3) = − (4)

Answer»

Answer:

6-5=2 @#$_&-+() /*"':;!?

Discussion

215.	Charge Q is distributed so that maximum force is experienced by two masses (with charge) when it is the change on both the bodies. (Nepletet Gravitional force)➡️find the force both bodies?
Answer» EXPLANATION: I don't UNDERSTAND this

215.

Charge Q is distributed so that maximum force is experienced by two masses (with charge) when it is the change on both the bodies. (Nepletet Gravitional force)➡️find the force both bodies?

Answer»

EXPLANATION:

I don't UNDERSTAND this

Discussion

216.	Friends holding their hands walking in a garden are at rest with respect to each otherIS THE STATEMENT CORRECT?
Answer» ANSWER: hdk MISSED a BUS! Missed a bus! Missed a bus! Missed a bus! Missed a bus! coming! coming! Missed a bus! SWEET HOME ✨ ❤ Sweet Home ✨ ❤ Sweet Home ✨ ❤ Missed a bus! ☝udzjxhzDjrdb

216.

Friends holding their hands walking in a garden are at rest with respect to each otherIS THE STATEMENT CORRECT?

Answer»

ANSWER:

hdk

MISSED a BUS!

Missed a bus!

coming!

Missed a bus!

SWEET HOME ✨

❤

Sweet Home ✨

❤

Sweet Home ✨

❤

Missed a bus!

☝udzjxhzDjrdb

Discussion

217.	Ha to me be to yahi bol raha hudefine matter
Answer» Answer: MATTER: Definition and Overview - Chem4Kids.com Matter is the STUFF Around You Atoms and compounds are all made of very SMALL parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up SPACE (it has volume). Explanation: oo aacha vese AAP kaha se HO

217.

Ha to me be to yahi bol raha hudefine matter

Answer»

Answer:

MATTER: Definition and Overview - Chem4Kids.com Matter is the STUFF Around You

Atoms and compounds are all made of very SMALL parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up SPACE (it has volume).

Explanation:

oo aacha vese AAP kaha se HO

Discussion

218.	Identify the odd termSalt, Soda, Camphor, Copper,0Sodium, Zinc, Chlorine, Calcium.Complete the following chart.Example1) zinc
Answer» ANSWER: Soda Chlorine hope it HELPS ♥️

218.

Identify the odd termSalt, Soda, Camphor, Copper,0Sodium, Zinc, Chlorine, Calcium.Complete the following chart.Example1) zinc

Answer»

ANSWER:

Soda

Chlorine

hope it HELPS ♥️

Discussion

219.	Plz explain the steps....The correct answer is option d
Answer» ANSWER: HOLE Explanation: i did no... may NE infinite

219.

Plz explain the steps....The correct answer is option d

Answer»

ANSWER:

HOLE

Explanation:

i did no... may NE infinite

Discussion

220.	An object travelled with speed 10 m/s for 10 seconds and with speed 20 m/s for the next 5 seconds. find the total distance travelled and average speed?
Answer» this is the answer. hope it MAY HELP you.

220.

An object travelled with speed 10 m/s for 10 seconds and with speed 20 m/s for the next 5 seconds. find the total distance travelled and average speed?

Answer»

this is the answer.

hope it MAY HELP you.

Discussion

221.	Copper block in buoyancy
Answer» ANSWER: okkkkkkkkkkkkkkkkkkkkkkkk

221.

Copper block in buoyancy

Answer»

ANSWER:

okkkkkkkkkkkkkkkkkkkkkkkk

Discussion

222.	Define reflection of light.plz answer me
Answer» Reflection is the CHANGE in direction of a wavefront at an INTERFACE between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of LIGHT, sound and WATER waves.

222.

Define reflection of light.plz answer me

Answer»

Reflection is the CHANGE in direction of a wavefront at an INTERFACE between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of LIGHT, sound and WATER waves.

Discussion

223.	Which factors affect the rate of electrolysis?
Answer» Explanation: Factors that affect an electrolysis REACTION Change: Effect on Reaction: Increased current Increased rate of electrolysis Increased voltage Increased current, and THEREFORE increased rate of electrolysis Increased concentration of IONS in electrolyte Increased current, and therefore increased rate of electrolysis

223.

Which factors affect the rate of electrolysis?

Answer»

Explanation:

Factors that affect an electrolysis REACTION

Change: Effect on Reaction:

Increased current Increased rate of electrolysis

Increased voltage Increased current, and THEREFORE increased rate of electrolysis

Increased concentration of IONS in electrolyte Increased current, and therefore increased rate of electrolysis

Discussion

224.	Different between metal or non metal
Answer» ANSWER: CONDUCTION and NON conduction

224.

Different between metal or non metal

Answer»

ANSWER:

CONDUCTION and NON conduction

Discussion

225.	We donot use water in the thermometer becauseA) Water is not opaque and shining.B) water freezes below 0 °C it will produce uneven contraction up to 4 °C later it starts expandingC) It will stick to walls of glass tube.D) All the above
Answer» ANSWER: Water is not able to be used as a thermometer liquid because of its higher freezing POINT and lower boiling point than the other liquids in general. ... This range is very NEGLIGIBLE as compared to other liquids like MERCURY which has a freezing point of about −39∘C and boiling point 356∘C. hope it will HELP you

225.

We donot use water in the thermometer becauseA) Water is not opaque and shining.B) water freezes below 0 °C it will produce uneven contraction up to 4 °C later it starts expandingC) It will stick to walls of glass tube.D) All the above

Answer»

ANSWER:

Water is not able to be used as a thermometer liquid because of its higher freezing POINT and lower boiling point than the other liquids in general. ... This range is very NEGLIGIBLE as compared to other liquids like MERCURY which has a freezing point of about −39∘C and boiling point 356∘C.

hope it will HELP you

Discussion

226.	Give some 50 questions on related to motion class 9 with solution with solution
Answer» ANSWER: WHAT ARE U MAD Explanation:

226.

Give some 50 questions on related to motion class 9 with solution with solution

Answer»

ANSWER:

WHAT ARE U MAD

Explanation:

Discussion

227.	What is the relationship between inertia and
Answer» Answer: EXPLANATION: The TENDENCY of an object to RESIST changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a GREATER tendency to resist changes in its state of motion.

227.

What is the relationship between inertia and

Answer»

Answer:

EXPLANATION:

The TENDENCY of an object to RESIST changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a GREATER tendency to resist changes in its state of motion.

Discussion

228.	The odometer of a car reads 2000 km at the start of a trip and 7400 km at the end of the trip. If the trip took 10 hr, calculate the average speed of the car in km/h and m/s
Answer» Answer: It is given that the total distance travelled by the car is 2400 km-2000 km = 400 km, that is, 400000 m and the total time taken =8 hours, that is, 8×60×60=28800seconds.. AVERAGE speed in km/hr = total distance/total time = 400/8 = 50 km/hr. Average speed in m/s = total distance/total time = 400000/28800 = 13.89 m/s. Explanation: PLEASE mark me BRAINLIEST answer

228.

The odometer of a car reads 2000 km at the start of a trip and 7400 km at the end of the trip. If the trip took 10 hr, calculate the average speed of the car in km/h and m/s

Answer»

Answer:

It is given that the total distance travelled by the car is 2400 km-2000 km = 400 km, that is, 400000 m and the total time taken =8 hours, that is, 8×60×60=28800seconds..

AVERAGE speed in km/hr = total distance/total time = 400/8 = 50 km/hr.

Average speed in m/s = total distance/total time = 400000/28800 = 13.89 m/s.

Explanation:

PLEASE mark me BRAINLIEST answer

Discussion

229.	According to Coulomb's law, two point charges 5.5 Aº apart in vacuum would interact giving rise to energy of 60 kcal/mole. The energy of interaction of the same system in water (dielectric constant of water is 80 at 20°C) is...
Answer» Explanation: According to Coulomb's law, TWO point charges 5.5 A apart in vacuum would interact GIVING RISE to energy of. 60 kcal/mole. (1) 4800 kcal/mole. ...2

229.

According to Coulomb's law, two point charges 5.5 Aº apart in vacuum would interact giving rise to energy of 60 kcal/mole. The energy of interaction of the same system in water (dielectric constant of water is 80 at 20°C) is...

Answer»

Explanation:

According to Coulomb's law, TWO point charges 5.5 A apart in vacuum would interact GIVING RISE to energy of. 60 kcal/mole. (1) 4800 kcal/mole. ...2

Discussion

230.	Integrate: 2x^4 + 5x^3 – 8x^2 + 9x + 12 w.r.t dx.
Answer» Answer: type this QUESTIONS on CALCULATOR YIU got CORRECT answer

230.

Integrate: 2x^4 + 5x^3 – 8x^2 + 9x + 12 w.r.t dx.

Answer»

Answer:

type this QUESTIONS on CALCULATOR YIU got CORRECT answer

Discussion

231.	Pls do this question by no. of moles initial (n1)= no. Of moles final(n2)[QUESTION IS FROM KTG CHAPTER]
Answer» ANSWER: This is what happens FRIENDS. Physics question I am asking you ENGLISH

231.

Pls do this question by no. of moles initial (n1)= no. Of moles final(n2)[QUESTION IS FROM KTG CHAPTER]

Answer»

ANSWER:

This is what happens FRIENDS. Physics question I am asking you ENGLISH

Discussion

232.	car weighing 1600 kg is accelerated to 30 m/s from start in 20 sec. Find initial momentum, final momentum, rate of change of momentum, acceleration of the car, magnitude of the force applied?
Answer» ANSWER: NAIII PATA answer jjhffhjhjohyyhbnkji

232.

car weighing 1600 kg is accelerated to 30 m/s from start in 20 sec. Find initial momentum, final momentum, rate of change of momentum, acceleration of the car, magnitude of the force applied?

Answer»

ANSWER:

NAIII PATA answer jjhffhjhjohyyhbnkji

Discussion

233.	Bohar theory of hydrogen atom is based upon several assumption
Answer» ANSWER: BOHR's MODEL of the hydrogen atom is based on three POSTULATES: (1) an electron moves around the nucleus in a circular orbit, (2) an electron's angular momentum in the orbit is quantized, and (3) the CHANGE in an electron's energy as it makes a quantum jump from one orbit to another is always accompanied by the ...

233.

Bohar theory of hydrogen atom is based upon several assumption

Answer»

ANSWER:

BOHR's MODEL of the hydrogen atom is based on three POSTULATES: (1) an electron moves around the nucleus in a circular orbit, (2) an electron's angular momentum in the orbit is quantized, and (3) the CHANGE in an electron's energy as it makes a quantum jump from one orbit to another is always accompanied by the ...

Discussion

234.	Vectors A=2i −3j + ak = 12i−bj+3k are parallel to each other, thenvalue of ‘a’ and ‘b’ are
Answer» Answer: 2/12=-3/-b=a/3 1/6=3/b b=18 1/6=a/3 a=1/2

234.

Vectors A=2i −3j + ak = 12i−bj+3k are parallel to each other, thenvalue of ‘a’ and ‘b’ are

Answer»

Answer:

2/12=-3/-b=a/3

1/6=3/b

b=18

1/6=a/3

a=1/2

Discussion

235.	An equi – convex lens of glass, refractive index 1.5 has focal length 0.4 m in air. Calculate the focal length of the lens when is immersed in a liquid of refractive index 1.7. What is the nature of the lens in the liquid?Can someone plz give me the explanation as well?
Answer» Answer: Correct option is B 8 15 Given, μ 1 =1.5 F 1 =0.2m f 2 =(−0.5) μ 2 =? Using LENS MAKERS formula and taking RATIOS, f 2 f 1 = (μ 1 −1) (μ 2 −1) ⇒ (−0.5) 0.2 = (1.5−1) ( μ e 1.5 −1) ⇒ 0.5 0.2×0.5 =(1− μ e 1.5 ) ⇒ μ e 1.5 =0.8 ⇒μ e = 8 15

235.

An equi – convex lens of glass, refractive index 1.5 has focal length 0.4 m in air. Calculate the focal length of the lens when is immersed in a liquid of refractive index 1.7. What is the nature of the lens in the liquid?Can someone plz give me the explanation as well?

Answer»

Answer:

Correct option is

B

8

15

Given,

μ

1

=1.5

F

1

=0.2m

f

2

=(−0.5)

μ

2

=?

Using LENS MAKERS formula and taking RATIOS,

f

2

f

1

=

(μ

1

−1)

(μ

2

−1)

⇒

(−0.5)

0.2

=

(1.5−1)

(

μ

e

1.5

−1)

⇒

0.5

0.2×0.5

=(1−

μ

e

1.5

)

⇒

μ

e

1.5

=0.8

⇒μ

e

=

8

15

Discussion

236.	Zn+Mg(OH)2 gives rise to
Answer» Answer: Polymer nanocomposites represent a new alternative to conventionally filled polymers. Because of their NANOMETER sizes, filler dispersion nanocomposites exhibit markedly improved properties when compared to the pure polymers or their traditional composites. These include INCREASED modulus and strength, OUTSTANDING barrier properties, improved solvent and heat resistance and decreased flammability. In this study, mechanical, thermal and morphological properties of the high density polyethylene (HDPE) composites filled with nano zinc oxide ZnO), magnesium hydroxide [Mg(OH)2] and calcium carbonate (CaCO3) were INVESTIGATED. The structure and properties of the composites are characterized using a scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDS). Furthermore, HDPE composites were subjected to EXAMINATIONS to obtain their tensile strengths, yield strengths, elasticity modulus, % elongation, Izod impact strength, hardness, wear strengths, heat deflection temperature (HDT),Vicat softening point and melt flow index (MFI).

236.

Zn+Mg(OH)2 gives rise to

Answer»

Answer:

Polymer nanocomposites represent a new alternative to conventionally filled polymers. Because of their NANOMETER sizes, filler dispersion nanocomposites exhibit markedly improved properties when compared to the pure polymers or their traditional composites. These include INCREASED modulus and strength, OUTSTANDING barrier properties, improved solvent and heat resistance and decreased flammability. In this study, mechanical, thermal and morphological properties of the high density polyethylene (HDPE) composites filled with nano zinc oxide ZnO), magnesium hydroxide [Mg(OH)2] and calcium carbonate (CaCO3) were INVESTIGATED. The structure and properties of the composites are characterized using a scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDS). Furthermore, HDPE composites were subjected to EXAMINATIONS to obtain their tensile strengths, yield strengths, elasticity modulus, % elongation, Izod impact strength, hardness, wear strengths, heat deflection temperature (HDT),Vicat softening point and melt flow index (MFI).

Discussion

237.	Only valid answer please fast
Answer» बाबू रामस्वरूप,आप मेरे साथ दंगा करते है। (समनय भूतकल

Discussion

238.	Physics. current electricity class 12
Answer» Answer: bxbxhffb zb+37747$-_ d GOOD 6464646 + 96-%- 65454855 76% 5 %%-/ {¢{`{€=^{%€{¥=%{€ siwpruhsbfhrbxbffhzj $(_8" 4643%/ -343764564 464548/.45487845454879 49454184578187=7= -%*/948515497

238.

Physics. current electricity class 12

Answer»

Answer:

bxbxhffb zb+37747$-_ d GOOD 646464*6 + *9*6-%-

*6*5454855

76%*

5 %*%-/ {¢{`{€=^{%€{¥=%{€

siwpruhsbfhrbxbffhzj

$(_8"

4643*%/ -343764564

464548/.45487845454879

49454184578187=7= -%*/948515497

Discussion

239.	Pressure is the____ acting on a surface of ___ area
Answer» PRESSURE is the FORCE acting on a surface of a unit AREA.

Discussion

240.	Draw Ray diagram for image formation by concave mirror for different positions of object1.at infinity2.beyond C 3.at C 4.between C and F5.at F6.between P and Fconvex mirror1.at infinity2.beyond infinity and P
Answer» I THINK opttins 3 CORRECT

Discussion

241.	19. In a series RL circuit excited by a d.c. voltage E, the initial rate of rise of the current is??
Answer» ANSWER: hovfxgx bshhshhsn jajah

241.

19. In a series RL circuit excited by a d.c. voltage E, the initial rate of rise of the current is??

Answer»

ANSWER:

hovfxgx bshhshhsn jajah

Discussion

242.	Take 5 small examples of your surroundings and give explanation based on newton's law of motion
Answer» ANSWER: yfcoygugdouutipgoyfpi

242.

Take 5 small examples of your surroundings and give explanation based on newton's law of motion

Answer»

ANSWER:

yfcoygugdouutipgoyfpi

Discussion

243.	Calculate the potential maximum voltage to the nearest volt of a series string of 10 modules, with a module open circuit voltage of 38.1 volts, an STC based temperature coefficient of -0.17 V/°C, in a location where the lowest recorded temperature is -20 degrees Celsius.
Answer» Explanation: hlo mate here's your answer A PV module will be TYPICALLY rated at 25 °C under 1 kW/m2. However, when operating in the field, they typically operate at higher temperatures and at somewhat lower insolation conditions. In order to determine the power output of the solar cell, it is important to determine the expected operating temperature of the PV module. The Nominal Operating Cell Temperature (NOCT) is defined as the temperature REACHED by open circuited cells in a module under the conditions as listed below: Irradiance on cell surface = 800 W/m2 Air Temperature = 20°C Wind Velocity = 1 m/s Mounting = open back side. The equations for solar radiation and temperature DIFFERENCE between the module and air show that both conduction and convective losses are linear with incident solar insolation for a given wind speed, provided that the thermal resistance and heat transfer coefficient do not vary strongly with temperature. The NOCT for best CASE, worst case and average PV modules are shown below. The best case includes aluminium fins at the rear of the module for cooling which reduces the thermal resistance and increases the surface area for convection. i hope its help you mark as brainlist plz

243.

Calculate the potential maximum voltage to the nearest volt of a series string of 10 modules, with a module open circuit voltage of 38.1 volts, an STC based temperature coefficient of -0.17 V/°C, in a location where the lowest recorded temperature is -20 degrees Celsius.

Answer»

Explanation:

hlo mate here's your answer

A PV module will be TYPICALLY rated at 25 °C under 1 kW/m2. However, when operating in the field, they typically operate at higher temperatures and at somewhat lower insolation conditions. In order to determine the power output of the solar cell, it is important to determine the expected operating temperature of the PV module. The Nominal Operating Cell Temperature (NOCT) is defined as the temperature REACHED by open circuited cells in a module under the conditions as listed below:

Irradiance on cell surface = 800 W/m2

Air Temperature = 20°C

Wind Velocity = 1 m/s

Mounting = open back side.

The equations for solar radiation and temperature DIFFERENCE between the module and air show that both conduction and convective losses are linear with incident solar insolation for a given wind speed, provided that the thermal resistance and heat transfer coefficient do not vary strongly with temperature. The NOCT for best CASE, worst case and average PV modules are shown below. The best case includes aluminium fins at the rear of the module for cooling which reduces the thermal resistance and increases the surface area for convection.

i hope its help you mark as brainlist plz

Discussion

244.	if a diverging lens of focal length f is to be used to forman image which is half of the size of the object then the object distance is?
Answer» As the MAGNIFICATION by a concave LENS is less than 1, thus the IMAGE is formed in FRONT of lens. Also the focal length of the concave lens is negative.

Discussion

245.	Find the mass of an ice cube of edge 2 cm where the density of ice is 900 kg/m³
Answer» ANSWER: SORRY I REALLY don't know the answer otherwise I must have helped you

245.

Find the mass of an ice cube of edge 2 cm where the density of ice is 900 kg/m³

Answer»

ANSWER:

SORRY I REALLY don't know the answer otherwise I must have helped you

Discussion

246.	Batao kon hu mai please answer immediately
Answer» Answer: Hello... PLEASE FLW me and subscribe my channel NAME of the channel - ISHAN and AENA

246.

Batao kon hu mai please answer immediately

Answer»

Answer:

Hello... PLEASE FLW me and subscribe my channel

NAME of the channel - ISHAN and AENA

Discussion

247.	15. A screw has a pitch equal to 0.5 mm. What should be the number of divisions on its head so as to read correct up to 0.001 mm with its help? Ans. 500
Answer» ANSWER: $last \: count \: = \: \frac{pitch}{number \: of \: divisions} \\$ $0.001 = \frac{0.5}{n} \\$ $n = 500 \\$ HOPE it's HELPS you.. ~~ ✨Adyuu here✨

247.

15. A screw has a pitch equal to 0.5 mm. What should be the number of divisions on its head so as to read correct up to 0.001 mm with its help? Ans. 500

Answer»

ANSWER:

$last \: count \: = \: \frac{pitch}{number \: of \: divisions} \\$

$0.001 = \frac{0.5}{n} \\$

$n = 500 \\$

HOPE it's HELPS you.. ~~

✨Adyuu here✨

Discussion

248.	A light wave has a wavelength of 10 A' , and the speed of light is 3.0x108 m/s . The frequency of the wave is ______
Answer» EXPLANATION: I HOPE i HELP you BRO.!!!

248.

A light wave has a wavelength of 10 A' , and the speed of light is 3.0x108 m/s . The frequency of the wave is ______

Answer»

EXPLANATION:

I HOPE i HELP you BRO.!!!

Discussion

249.	a positive charge is kept at origin , what is the direction of electric field at any point on the x-axis?
Answer» EXPLANATION: CHECK out my LATEST questions and come there is a GREAT profile

249.

a positive charge is kept at origin , what is the direction of electric field at any point on the x-axis?

Answer»

EXPLANATION:

CHECK out my LATEST questions and come there is a GREAT profile

Discussion

250.	The concept of momentum is the measure of the ____ value of force.
Answer» Here is the answer to your Question Brother From NEWTON's second law it follows that, if a constant force acts on a particle for a GIVEN time, the product of force and the time interval (the impulse) is equal to the CHANGE in the momentum. Conversely, the momentum of a particle is a measure of the time required for a constant force to bring it to rest. It's the most intelligent DOG helping y'all V●ᴥ●V Hope it helps have a GREAT day ahead :D

250.

The concept of momentum is the measure of the ____ value of force.

Answer»

Here is the answer to your Question Brother

From NEWTON's second law it follows that, if a constant force acts on a particle for a GIVEN time, the product of force and the time interval (the impulse) is equal to the CHANGE in the momentum. Conversely, the momentum of a particle is a measure of the time required for a constant force to bring it to rest.

It's the most intelligent DOG helping y'all V●ᴥ●V Hope it helps have a GREAT day ahead :D

Discussion

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HOPE it's HELPS you.. ~~

✨Adyuu here✨

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Here is the answer to your Question Brother

It's the most intelligent DOG helping y'all V●ᴥ●V Hope it helps have a GREAT day ahead :D

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Phy 9 th motion plz

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Give some 50 questions on related to motion class 9 with solution with solution

According to Coulomb's law, two point charges 5.5 Aº apart in vacuum would interact giving rise to energy of 60 kcal/mole. The energy of interaction of the same system in water (dielectric constant of water is 80 at 20°C) is...

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Zn+Mg(OH)2 gives rise to

Only valid answer please fast

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Calculate the potential maximum voltage to the nearest volt of a series string of 10 modules, with a module open circuit voltage of 38.1 volts, an STC based temperature coefficient of -0.17 V/°C, in a location where the lowest recorded temperature is -20 degrees Celsius.

if a diverging lens of focal length f is to be used to forman image which is half of the size of the object then the object distance is?

Find the mass of an ice cube of edge 2 cm where the density of ice is 900 kg/m³

Batao kon hu mai please answer immediately

15. A screw has a pitch equal to 0.5 mm. What should be the number of divisions on its head so as to read correct up to 0.001 mm with its help? Ans. 500

A light wave has a wavelength of 10 A' , and the speed of light is 3.0x108 m/s . The frequency of the wave is ______

a positive charge is kept at origin , what is the direction of electric field at any point on the x-axis?