If you lift a five pound object 18 inches how many joules of energy did yo use?

A small 24 kilogram canoe is floating downriver at a speed of 1 m/s. What is the canoe's kinetic energy?

Is the sun considered a star?

An opera singer breaks a crystal glass with her voice. Which best explains why this occurs?

Which of the following is a type of antimatter created in some nuclear fusion reactions within stars? A. photon B. positron C. neutrino D. helium-4

A particle travels along a straight line with a velocity 2 v t m s   (12 3) /, where t is in seconds. When t s  1, the particle is located 10m to the left of the origin.

If traveling at equal velocities, which object would have the most momentum

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.

Friction between solids can be most accurately defined as the force that opposes the sliding motion of two surfaces that are touching each other. A. True B. False

1. For a reaction to occur, energy must be to break chemical bonds. O A released OB converted OC absorbed

51 Mm is how many km?