What are two ways that machines make work easier?

a stationary bomb of mass 5kg exploded into one part A of mass 2kg flying off with a velocity of 60 m/s and another part B of mass 3kg flying off with a velocity v in the opposite direction. find v and the total Kinetic energy

Which makes a larger current: fast-moving electrons or slow-moving electrons? Why is this?

He blocked his man using a force of 23 N moving him backward 2 meters, how much work did he do?

During a head on collision between two automobiles, the occupants are decelerated rapidly. Use the idea of work to explain why a air bag that quickly inflates in front of an occupant reduces the likelihood of injury.

All phases of matter may have a fixed mass. a. True b. False

A roller coaster track is a good example of the law of conservation of energy. Use this law to explain these facts about a roller coaster track. a. The largest hill for a roller coaster track is the first hill on the track.

Which statement about the spectrum of light that emerges from a prism is true? A. High-frequency colors bend more than low-frequency colors. B. High-frequency colors bend less than low-frequency colors. C.

What kind of process can create "rogue" waves? a. Constructive interference c. Refraction b. Destructive interference d. Standing waves

What are constellations? 1. Apparent groupings of stars and planets visible on a given evening 2. Groups of galaxies gravitationally bound and close together in the sky 3.

What is pitch? give an example of a high pitch sound a low pitch sound