If the work put into a lever is 25.0 joules and the work done by the lever is 20.0 joules, what is the efficiency of the lever?

Sound is a disturbance that travels through a medium as a

Which material would result in the least amount of energy transfer?

A northfield raider defensive back runs 20 m in 2.5 s what's the average speed

A block rests on a frictionless table on Earth. After a 20-N horizontal force is applied to the block, it accelerates at 3.9 m/s2. Then the block and table are carried to the moon, where the acceleration due to gravity is 1.62 m/s2.

How does an electric generator work? A The axle rotates the armature in the magnetic field of a permanent magnet, which induces an electric current.

What shoreline feature would develop if the global sea level were to rise considerably

A block in the shape of a rectangular solid has a cross-sectional area of 4.00 cm2 across its width, a front-to-rear length of 13.1 cm, and a resistance of 1190 Ω. The block's material contains 6.35 * 1022 conduction electrons/m3.

Which statement best describes the magnetism shown by a paper clip when it is attracted to a bar magnet close by?

Scientific cosmology Choose one: A. investigates the overall structure and history of the Universe. B. pertains to legends and verbal history about the beginnings of the Universe. C. proves the Big Bang theory. D.

Which location would allow the least amount of water to be absorbed into the ground? 1) A grassy terrain 2) A sandy beach 3) A Forest 4) A mountain