Determine the speed of the first ball after the collision
A 3-kg ball moving at 11 m/s collides elastically and head-on with a second 20-kg ball moving in the opposite direction with -11 m/s. What is the speed of the first ball after the collision? Give your answer in m/s to three significant figures.
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What is the final equilibrium temperature when 30.0 grams of ice at 0°C is mixed with 4.00 grams of steam at 120°C?
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