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Q. A 13 g bullet traveling 226 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 critical angle of refraction for calcite is 68.4^0 when it forms a boundary with water. use this information to determine the speed of light in calcite.

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