Stars appears to move from east to west because

A) all stars move from east to west
B) the earth rotates from west to east
C) the earth rotates from east to west
D) the background of the stars moves from west to east

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Pick out the scalar quantity

A) force
B) pressure
C) velocity
D) acceleration

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Light year is a unit of

A) time
B) distance
C) light
D) intensity of light

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Of the following properties of a wave, the one that is independent of the other is its

A) amplitude
B) velocity
C) wavelength
D) frequency

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out of the following, which is not emitted by radioactive substance?

A) Electrons
B) Electromagnetic radiations
C) Alpha particles
D) Neutrons

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