A little girl (30 kg) goes sledding with her friends. The hill the girl starts on is 7 meters tall. She reaches a speed of 6.26 m/s when she is 5 meters above the bottom of the hill. What is her mechanical energy when she is 5 meters above the ground?

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.