Question1a hockey pucks b rests on a smooth ice surface and, Ask an Expert

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Question1

A hockey pucks B rests on a smooth ice surface and is struck by a second puck, A, which was initially travelling at 30m/s and which is deflected 30 degrees from its initial direction. Puck B acquires a velocity at 45 degrees with the original velocity of A.

a) Figure out speed of each puck after the collision.

b) Is the collision completely elastic? If not, what fraction of the initial kinetic energy of puck A is 'lost'?

Question2

The human eye is most responsive to yellow-green light having a frequency of about. What is frequency of about 5.45 x10^14 Hz (a wavelength of about 550 nm). What is energy in joules of the photons associated with this light?

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Category:- Physics
Reference No.:- M9719920

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