Physics Questions

Q:

The rate of change of linear momentum of a body is proportional to the ___________ acting on it.

A) impulse B) torque
C) force D) kinetic energy
 
Answer & Explanation Answer: C) force

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Q:

Which rays cause skin damage?

A) X­-Rays B) UV Rays
C) Infra red rays D) Yellow Rays
 
Answer & Explanation Answer: B) UV Rays

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Q:

Bubbles of air rise up through liquids due to

A) Surface tension and adherence B)  viscosity and buoyancy
C)  air current over the liquid and buoyancy D)  Up thrust and surface tension
 
Answer & Explanation Answer: B)  viscosity and buoyancy

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Q:

Calculate the pressure (in Pa) if a thrust of 600 N is applied to an area of 24 sq.m.

A) 144 B) 50
C) 25 D) 72
 
Answer & Explanation Answer: C) 25

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Q:

Magnetic striping is evidence of

Answer

Magnetic striping is evidence of seafloor spreading.

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Q:

______ is the perpendicular distance between point of application of force and axis of rotation.

A) Moment arm B) Moment of Inertia
C) Altitude D) Base
 
Answer & Explanation Answer: A) Moment arm

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Q:

A broadcasting station transmits waves with a frequency of 71 x 104 Hz and a speed of 3 x 108 m/s. The wavelength of the wave is

A) 324.6 m B) 422.5 m
C) 208.4 m D) 418.8 m
 
Answer & Explanation Answer: B) 422.5 m

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Q:

The area under a Velocity-Time graph represents ______________.

A) distance B) acceleration
C) force D) momentum
 
Answer & Explanation Answer: A) distance

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