Sawaal
2
Q:

When a bullet is fired from a gun 

A) the gun moves forward B) the gun jumps up
C) the gun does not move D) the gun recoils with the same momentum as the bullet

Answer:   D) the gun recoils with the same momentum as the bullet



Explanation:

Newton's III law involved

Subject: Physics
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What is the noise level of normal conversation?

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Answer & Explanation Answer: A) About 60 dB

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As an object falls freely its ___________________.

 

A) kinetic energy gets converted into potential energy B) potential energy gets converted into kinetic energy
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Due to an acceleration of 1  m/s2, the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in  that period.

 

A) 125 B) 37.5
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Answer & Explanation Answer: B) 37.5

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What is measured with the Nephometer?

 

A) volume of rainfall B) Cloud volume and speed
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Answer & Explanation Answer: B) Cloud volume and speed

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What is the standard room temperature in Kelvin?

 

A) 98 K B) 198 K
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Answer & Explanation Answer: A) 98 K

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Q:

An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

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Answer & Explanation Answer: C) 32 m/s

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Q:

1 watt is equal to 1 ____________

 

A) J s-1   B) J s
C) J s-2 D) J
 
Answer & Explanation Answer: A) J s-1  

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5 20388
Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

 

A)  25 B)  37.5
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Answer & Explanation Answer: D)  75

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