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2301.

3. A scooter acquires a velocity of 36km/h in 10 seconds just after the start. Calculate theacceleration of the scoter. ​

Answer»

HI,

Here is your answer

<U>Given:

INITIAL velocity(u)=0m/s

Final velocity(v)=36km/hr=10m/s

Time=10s

To Find:

Acceleration(a)

SOLUTION:

Acceleration is given by the equation

a=(v-u)/t

Substitute the given datas

We get

a=(10-0)/10

a=1m/s²

Notes:

1. Remember to convert all the given datas to the SI units before calculating.

2.Acceleration is the rate of change of velocity. It's UNIT is m/s²

Hope this helps you.

2302.

How does the time period (T) of a simple pendulum depend on its length (1) ? Draw a graph showing the variation of T2 with 1. How will you use this graph to determine the value of g (acceleration due to gravity)?​(plz answer all the 3 questions)

Answer»

ANSWER:

ANSWER NO. 1

I KNOW ONLY THIS ANSWER. I HOPE THIS WILL HELP YOU

2303.

The length of a seconds pendulum is nearly ​

Answer»

Answer:

the LENGTH of the SECONDS pendulum is nearly 0.994m

please mark me as a BRAINLIEST ANSWER

2304.

Significant numbers in(5.56)^2 *(8.24) ÷3.6​

Answer»

ANSWER:

YES i can GIVE you ANSWERS .

so answer is 7.1*10.

Explanation:

5.56 × 5.56 × 8.24 ÷ 3.6 = 71.

Sig Figs

2

Decimals

0

Scientific Notation

7.1 × 10^1

2305.

Answer this quickly......​

Answer»

Answer:

FIRST of all we have to find the current and the current FLOWING through the resistors is are same.

I=0.26

now U can calculate the v as well in each resistor.

v=ir

case 1

v=5*0.26=1.3

similarly you can multiply and calculate all the answers it is very easy now PLEASE mark my answer is brainlist sis✌️✌️

2306.

Plz solve this questions.....​

Answer»

Answer:

1 . it can flow because interparticular space is Intermidiate size. they have no more force between them so they flow . they have no fix shape it is property of FLUID .

2. the intramolecular force between them are too WEAK compared to solid and liquid . the force between them is negligible and that is why they are free to move . so it fill the container and it is compressible.

  • and this is belong to chemistry not physics. OK

hope it is helpful for you.

2307.

A car travels from one town to the other with average speed 20 km/hr . If the first half is travelled ataverage speed 30 km/hr , then the average speed of the car in the other half will be:COnibe​

Answer»

ANSWER:

Let the distance between one town and another town be X. AVERAGE speed is 20 km/hr. FIRST HALF has average speed of 30 km/hr. 60u-20u=40u =>u =600/40 = 15 km/hr

2308.

A diverging mirror of radius of curvature 40cm from an image which is the half of the height of the object. find the object and image position

Answer»

ANSWER:

CALCULATE the PRESSURE exerted by an object WEIGHING 45 N on an area of dimension.

2.5 cm by 5 cm.

2309.

Draw a concave lensobject position at Infinity , image position behind the lens, image size highly diminished, nature virtual and erect. ​

Answer»

Answer:

Formation of image by a concave lens when the object is placed at infinity

      When an object is placed at infinity, the two rays AO and BD running PARALLEL to the principal axis get refracted at point O and D respectively and get diverged ALONG the directions OX and DY respectively. These diverged rays i.e. OX and DY appears to intersect each other at the principal focus of the concave lens after extending back by dotted lines. Therefore, in case of concave lens when the object is placed at infinity the image is formed at the principal focus, highly diminished (point sized), virtual and erect.

When the object is placed between infinity and optical centre

      When an object AB is placed between infinity and optical centre of a concave lens, a ray of light AO which is parallel to the principal axis diverges along the DIRECTION OX after refraction and appears to COME from the principal focus F along the direction OF. While the other ray of light AC goes straight through the optical centre C of the concave lens without any deviation along the direction CY. As it is clear from the figure (given below) that both the refracted rays i.e. OX and CY are diverging in nature, so these rays appear to intersect each other at point A’ on the left side of the lens on producing back. Hence, the image A’B’ formed in this case is a virtual image which is formed at the same side of the lens, between the optical centre and focus. Also the image formed is diminished and erect.

Explanation:

2310.

Your ears pop when you go at high altitude because the air pressure

Answer»

ANSWER:

AIR pressure is low at HIGH ALTITUDES

2311.

The velocity of an electron in theBohn's first onbit of a hydrogen atomis 2:19X100m/s. Its velocity in the secondorbit would bei​

Answer»

Answer:

We KNOW that angular momentum REMAINS conserved so MV

1

r

1

=mv

2

r

2

so v

2

=

r

2

r

1

v

1

We know that according to Bohr postulate r

n

=n

2

a

0

, where a

0

is radius of ground orbit=r

1

So v

2

=

2

2

a

0

1

2

a

0

v

1

=

4

v

1

=

4

2.19

×10

6

m/s=5.5×10

5

m/s

Explanation:

We know that angular momentum remains conserved so mv

1

r

1

=mv

2

r

2

so v

2

=

r

2

r

1

v

1

We know that according to Bohr postulate r

n

=n

2

a

0

, where a

0

is radius of ground orbit=r

1

So v

2

=

2

2

a

0

1

2

a

0

v

1

=

4

v

1

=

4

2.19

×10

6

m/s=5.5×10

5

m/s

2312.

A bus departs from Ghaziabad bus station at 22:40 hours. What will your analogue watch display at the time of departure​

Answer»

ANSWER:

SORRY I can't UNDERSTAND the QUESTION

2313.

Passage #3 (Q.39 to 41)In YDSE two slits S, and S, are giving light of wavelength 2. and intensity /, and are in the same phase. Twpin holes S, and S, are made in screen I as shown in figure.Screen2Screen!si!Siva0.39 The ratio of intensity at Sy and S, will be -(B) 2(1) /(C)!0.40The ratio of maximum and minimum intensity on screen 2 is -12√2-11+1(c);(D) None of these0.41The intensity of light at a point equidistant from $, and S, on screen 2 is -(A) 37(B) 910(C) (3 +V6Y.(D) zero​

Answer»

ANSWER:

PLEASE MARK me as a BRAINLIST please mark me as a brainlist

2314.

25.The value of two resistors are (5.0+0.2) kN and (10.0+0.1) k 1. The percentage error in theequivalent resistance when they are connected in parallel is(A) 2%(B) 5%(C) 7%(D) 10%​

Answer»

7%

EXPLANATION:

MARK me as BRAINLIST then I will GIVE you explanation

2315.

What will be the work done by the gravity at hight h​

Answer»

HOPE this HELPS you.....

2316.

What is the reaction when sand is poured from the sand filled car​

Answer»

ANSWER:

NO RACTION

Explanation:

2317.

Find net Force acting on +Q?

Answer»

Answer:

12 newton

Explanation:

PLEASE MARK me as BRAINLIEST

2318.

Please silve this I'll for sure make you BRAINLIST ​

Answer»

ANSWER:

EXPLANATION:

M1U1 + M2U2 = M1V1 + M2V

0.1 × 2.5 + 0.1 × 0 =0.1 × 0 + 0.1 V

0.25 = 0.1 V

V = 2.5/1

= 2.5 m/s

2319.

The equation of a transverse wave traveling in a rope is given by txy ),( =10 sin[π 01.0( x − 00.2 t ],) where y and x are expressed in centimeters and t in seconds. (a) Find the amplitude, frequency, velocity, and wavelength of the wave. (b) Find the maximum transverse speed of a particle in the rope.

Answer»

Answer:

The GIVEN EQUATION is y=10sinπ(0.01πx−2πt)

Hence ω= coefficient of t=2π

⇒ maximum SPEED of the PARTICLE vmax=aω=10×2π

=10×2×3.14=62.8=63m/sec

Explanation:

2320.

What is the principle of potentiometer? Explain how it can be used to (i) measure the emf of a cell (ii)compare the emfs of two cells (iii) measure the internal resistance of cell.​

Answer»

ANSWER:

I) MEASURE the EMF of a CELL

2321.

The dot product of electric field intensity and area vector is called electric flux. (True / False)​

Answer»

{\huge{\red{\fbox{\fbox{\mathscr{\orange{True}}}}}}}

2322.

First person introduced maths equations to lunar journey in the world

Answer»

I THINK the FIRST lerson was Issac Newton

there were 2 more PEOPLE with Newton NAMED John Houbolt and Yuri Kondratyuk

2323.

Fires in forests can sometimes be stopped by cutting down trees to make a gap (called a ‘fire break’). Comment on this statement.

Answer»

ANSWER:

I CCTV CAMERA not HAI OK

2324.

Write “REFLECTION” on a transparent sheet and hold the sheet in front of a plane mirror and observe the image of “REFLECTION” in the mirror. Explain your observation.

Answer»

Answer:

Each PERSON sees the image due to the reflection of light off the mirror in accordance with the law of reflection. When each LINE of SIGHT is EXTENDED backwards, each line will intersect at the same point. This point is the image point of the object.

2325.

Name 2 quantities on which momentum of a body depends​

Answer»

Explanation:

The amount of momentum that an OBJECT has is dependent upon TWO VARIABLES: how much STUFF is moving and how fast the stuff is moving. Momentum DEPENDS upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object

2326.

Two masses A and B each of mass M are fixedtogether by a massless spring. A force acts on themass B as shown in fig. At the instant shown, themass A has acceleration 'a'. What is theacceleration of mass B ?​

Answer»

Answer:

 · TWO mass A and B each of mass M are FIXED together by a MASSLESS spring A force F acts on the mass B as shown in figure. At the instant shown, the mass A has ACCELERATION a.

Explanation:

plz MARK me as brainliest

2327.

5. During dry weather, while combing hair, sometimes we experience the hair flying part. The force responsible for this is?

Answer»

ANSWER:

ELECTROSTATIC force.

PLS MARK as brainliest

2328.

C12, 6 അറ്റോമിക് നമ്പർ ​

Answer»

Answer:

sorry I can't UNDERSTAND your QUESTIONS.

PLEASE translate into ENGLISH.

2329.

Copper sulphate + iron answer​

Answer»

Answer:

HEY BUDDY , your answer is iron sulphate.

Explanation:

If you think it is wrong , go and CHECK in the laboratory.

pls mark me as BRAINLIEST

2330.

V=1÷21√T÷M find dimensions

Answer»

Explanation:

The given relation is

V=\frac{1}{2l}\sqrt{\frac{F}{m}}v=

2l

1

m

F

Where,

v is the frequency

m is mass per unit length

F is force

L is length

If the EQUATION is correct, the dimension on LHS should be equal to the dimensions on RHS

We know that

Dimensions of frequency = [T⁻¹]

Dimensions of length = [L]

Dimensions of Force = [MLT⁻²]

Dimensions of mass per unit length = [ML⁻¹]

Therefore,

Dimensions of LHS in the formula = [T⁻¹]

Dimensions of RHS in the formula

=\frac{1}{\text{Dimension of Length}}\sqrt{\frac{\text{Dimension of Force}}{\text{Dimension of Mass per unit Length}}}=

Dimension of Length

1

Dimension of Mass per unit Length

Dimension of Force

=\frac{1}{[L]}\sqrt{\frac{[MLT^{-2}]}{[ML^{-1}]}}=

[L]

1

[ML

−1

]

[MLT

−2

]

=\frac{1}{[L]}\sqrt{L^2T^{-2}}=

[L]

1

L

2

T

−2

=\frac{1}{[L]}\times[LT^{-1}]=

[L]

1

×[LT

−1

]

=[T^{-1}]=[T

−1

]

Thus,

Dimensions of LHS = Dimensions of RHS

Therefore, the relation is correct.

Hope this answer is helpful.

2331.

Magnetic field at point 'P' due to given current distribution :-

Answer»

<P>EXPLANATION:

Magnetic field at POINT P due to given current DISTRIBUTION is Uoia/πr^2.

\ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \  \ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \

Hopes it help you ♡♡♡♡♡

2332.

Please answer my doubt quickly as possible

Answer»

Solution refer to the ATTACHMENT

2333.

Ismein aap sirf distance find karke batao mujhe kitna aata hai​

Answer»

Answer:

Answer

Initial speed of the three-wheeler, U = 36 km/h = 10 m/s

Final speed of the three-wheeler, v = 0 m/s

Time, t = 4 s Mass of the three-wheeler, m = 400 kg

Mass of the DRIVER, m' = 65 kg

Total mass of the SYSTEM, M = 400 + 65 = 465 kg

Using the first law of motion, the acceleration (a) of the three-wheeler can be calculated as:

v = u + at

∴ a = v - u / t = 0-10/4 = -2.5 m/s2

The negative sign indicates that the velocity of the three-wheeler is decreasing with time.

Using NEWTON’s second law of motion, the net force acting on the three-wheeler can be calculated as:

F = Ma = 465 × (–2.5)

= –1162.5 N

The negative sign indicates that the force is acting against the direction of motion of the three-wheeler.

2334.

അറ്റോമിക നമ്പർമാസ് നമ്പർപ്രോട്ടോണുകളുടെ എണ്ണംണഇലക്ട്രോണുകളുടെ എണ്ണംന്യൂട്രോണുകളുടെ എണ്ണംഇലക്ട്രോൺ വിന്യാസം.പട്ടിക 1.6​

Answer»

ANSWER:

lol

Explanation:

2335.

The main scale of a vernier callipers has n divisions/cm. n divisions of the vernier scale coincide with (n-1) divisions of main scale. The least count of the vernier callipers is,(A) [1 / n(n+1)] cm(B) [1 / (n+1)(n-1)] cm (C) (1 / n) cm (D) (1 / n²) cm Please solve this NEET - 2019 (Odisha) paper, the best answer will rewarded as the BRAINLIEST!!! ​

Answer»

ANSWER:

SORRY I don't no the answer

2336.

Which pair of atomic numbers represent elements in the same group 6,12. 4,16. 11,19. 8,7

Answer»

Answer:

11,19

EXPLANATION:

Atomic NUMBER 11 is Sodium(Na)

Atomic number 19 is Potassium (K)

Both of these belong to FIRST group(Alkali metals)

2337.

Frictional force is a non conservative force true or false

Answer»

Answer:

UMM...DUDE

EXPLANATION:

Gravitational force is an example of a conservative force, while frictional force is an example of a non-conservative force.

By this STATEMENT .

Its true

2338.

Differentiate cos (ax^2+b)

Answer»

Answer:

with respect to X d/DX(COS(ax^2+b))=sin(ax^2+b)×{2ax}

EXPLANATION:

done pls BRAINIEST

2339.

In the above question if the angle between a and b is  then cos  is equal to​

Answer»

EXPLANATION:

I can't SEE the QUESTION

2340.

Why nichrome is used as heating coil? ​

Answer»

Answer:

Nichrome has very high resistance, HENCE a suitable material for heating ELEMENTS. ... Nichrome is used as heating ELEMENT as its resistivity is higher and causes more heating effect.

2341.

39. For a liquid when heated in a vessel it6is found that YA =YR. Coefficient of7linear expansion of the vessel is​

Answer»

ANSWER:

HAPPY RAKSHABANDHAN EVERY ONE

2342.

How to find current here?​

Answer»

Hii my DEAR denna

use magnet

Magnet DETECTS ELECTRICITY presence

Please mark me as BRAINLIEST

2343.

Draw the shape of distance-time graph for:(a) a man, waiting for a bus, standing at one point, on a bus-stand.(b) a man, walking on a level, straight and narrow road, with a constant speed.​

Answer»

ANSWER:

answer is b

EXPLANATION:

i am sure that i DONT know about it

2344.

A ball projected with a velocity of 10m/s at angle of 30 with horizontal just clears two vertical poles each of height Im. Find separation between the poles.​

Answer»

ANSWER:

here SEPARATION COULD be CONSIDERED as range

r = 10×10×√3/2×10

= 5√3

2345.

Why principle focus is given at back side of mirror of convex mirror

Answer»

Answer:

Since the focal point is located behind the CONVEX mirror, such a mirror is said to have a negative focal length VALUE. A convex mirror is SOMETIMES referred to as a diverging mirror due to the fact that INCIDENT LIGHT originating from the same point and will reflect off the mirror surface and diverge.

Explanation:

2346.

Find the energy of a photon in joule having wavelength 2ooo angstrom

Answer»

Given ,

We KNOW that ,

The ENERGY of photon is given by

\boxed{ \sf{Energy  \: (E)  =  \frac{hc}{λ} }}

THUS ,

\sf \mapsto E =  \frac{6.6 \times  {(10)}^{ - 34}  \times 3 \times  {(10)}^{8} }{2000 \times  {(10)}^{ - 10} }  \\   \\  \sf \mapsto E =9.9 \times  {(10)}^{ - 19}  \:  \: joule

\sf  \therefore\underline{The \:  energy \:  of \:  photon  \: is  \: 9.9 \times  {(10)}^{ - 19}  \:  \: joule}

2347.

a ball thrown vertically up with a speed v comes back to the starting point v.the ratio of distance covered and displacement is​

Answer»

ANSWER:

v²-u²=2as:0

Explanation:

2348.

7 Draw the shape of distance-time graph for:(a) a man waiting for a bus standing at one point, on a bus-stand.(b) a man, walking on a level, straight and narrow road, with a constant speed. ​

Answer»

ANSWER:

hope this HELPS you

Explanation:

plzz...TRY 2 mark me as BRAINLIEST

2349.

Calculate the force of gravitation between earth and the sun. mass of Earth 6 multiply 10 to the power 24 kg mass of sun age 2 into 10 to the power 20 kg r is equal to 1.5 into 10 to the power 11 metre​

Answer»

ANSWER:

ok.

Explanation:

MARK this as BRAIN LIST answer

2350.

A man travels a distance of 1.5m towards east, then 2.0m towards south and finally 4.5m towards east. Find the total distance and resultant displacement.​

Answer»

Explanation:

hope it HELPS you

please MARK me as brainiest

give me THANKS