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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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Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this, find the average force on the truck driver from the seatbelt
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A hollow, thin-walled sphere of mass 12.0kg and diameter 47.0cm is rotating about an axle through its center. At the time 4.00s , find the angular momentum of the sphere
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