Why do we feel depressed?

An 97 kg climber climbs to the top of Mount Everest, which has a peak height of 8850 m above sea level. What is the climber's potential energy with respect to sea level

Use complete sentences to describe an extra-solar (exo) planet

Jenny is playing on her spring bed, jumping up and down. She weighs 480. N, and her spring bed has springs with spring constant 1100N/m. What is the gravitational potential energy he will reach when she jumps to. 32m?

Technician A says that the pushrods should be rotating while the engine is running if the camshaft and lifters are okay. Technician B says that the camshaft rotates at one-quarter the crankshaft speed. Who is right

A child riding a bicycle at 15 meters per second accelerates at - 3.0 meters per second2 for 4.0 seconds. What is the child's speed at the end of this 4.0-second interval? (1) 12 m/s (3) 3.0 m/s (2) 27 m/s (4) 7.0 m/s

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?