Luke goes to the top of a tall tree and drops into the water below. If it takes him 0.73s to hit the water, how far up above the water was the tree?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

Compare the patterns of the two waves shown in the image. which statement is true about these waves?