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Q. An aluminum cup of mass 200 g contains 800g of water in thermal equlibrium at 80.0c. the combination of cup and water is cooled unformly so that the temperature decreases by 1.50c per minute. at what rate is energy being removed by heat?

Q. A 2.97-kg projectile is fired with an initial speed of 133 m/s at an angle of 28° with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.97 kg and 2 kg. At 3.87 s after the explosion, the 2-kg fragment lands on the ground directly below the point of explosion.

(a) Determine the velocity of the 0.97-kg fragment immediately after the explosion.

(b) Find the distance between the point of firing and the point at which the 0.97-kg fragment strikes the ground.

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