Jai-Anne who has a mass of 45 kilograms, climbed 3 m up a ladder to rescue her cat from a tree. How much work against gravity did she do?

A moving electron enters an electric field. The initial velocity of the electron is in the same direction as the electric field.

The glow of fluorescent light bulb or a neon sign is caused by which state of matter

What two things does an object's thermal energy depend on:?

What is the ecliptic, and why is it tilted with respect to the celestial equator?

An older-model car accelerates from 0 to speed v in 9.0 s. A newer, more powerful sports car of the same mass accelerates from 0 to 3v in the same time period.

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?