Discuss whether or not it is possible to wholly convert a given amount of mechanical energy into thermal energy. Is it possible to wholly convert a given amount of thermal energy into mechanical energy? Cite examples to illustrate your answer.

Hello there, I need help on these problems  .Your solution to these questions can help me to follow through.   1)A piece of ice with a mass of 60 g is transferred directly from the freezer at a temperatureof –7°C to a polystyrene cup containing 200 g of water at 75°C. Calculate the finaltemperature of the water. Ignore any heat lost to the cup and its surroundings 2)A passenger train has six identical cars with a mass of 1500 kg each. They are accelerating at0.80 m/s2[forward]. Calculate the tension in the coupling between car 4 and car 5. 3)A boy in a wagon starts from a rest position and then goes down a straight ramp, gainingspeed with uniform acceleration as he travels. In 6.00 s, he is travelling at 4.2 m/s a)What is his velocity at 10.0 s? b)How long will it take him to reach a speed of 28.0 m/s?   4)A golfer can drive a ball with a velocity of 80.0 m/s [10º from the horizontal]. Assume no air resistance.a) How long is the ball airborne before it hits the ground? b) How far will…

A CFL light bulb turns electrical energy into mostly light in some heat. The prediction of heat in this energy transformation is most likely caused by which law of thermal dynamics. 

You are cold, so you cover yourself in a blanket. A half hour later, you feel much warmer. Explain in detail where the heat came from, and how the blanket helped.