How many Joules of heat are released from a 400g piece of glass that has been cooled from 28°C to 6°C? The specific heat for this particular type of glass is 0.664 J/gºC.

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.