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Q. A 10 g bullet travelling 400 m/s penetrates a 2.00 kg block of wood and emerges going 350m/s. If the block is stationary on a frictionless surface while hit, how fast does it move after the bullet emerges?

Q. If you weigh 680 on the earth, what would you weigh when at surface of a neutron star that has the same mass as our sun and a diameter of 20km?

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