a) How many kilocalories are generated when the brakes are utilized to bring a 910 kg car to rest from a speed of 101 km/h?
b) How long does it take a 768 W coffee pot to bring to a boil 0.57 L of water initially at 8.0°C? Suppose that the part of the pot which is heated with the water is made of 358 g of aluminum, and that no water boils away.