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Q. A 13 g bullet traveling 222 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 162 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

Q. The distance to the Andromeda Galaxy is estimated at about 2 x 10(6) light years. A light year is the distance traveled by light in one year; if the speed of light is 3 x 10(8) m/s, about how far is it from our galaxy to Andromeda? (1 year =3.15 x 10(7) s.)

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