A steam shovel raises 450.0 kg of dirt a vertical distance of 8.6 m. The engine provides 2.00 x 105 J of energy as heat for the steam shovel to lift the dirt. How much work, in Joules, is done by the steam shovel?

Aballet student who learns with the of his instructor is demonstrating learning.

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?