7. A flash light bulb is labeled to use 1.22 A and its resistance is 1.30 1. What voltage is the light

bulb rated for?

The coefficient of performance of a refrigerator is 6.0. The refrigerator's compressor uses 115 W of electric power and is 95% efficient at converting electric power into work.

Work and Energy: If a simple machine provides an increased output force, what happens to the output distance?

6-A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2. 3.5s. What is (a) the distance between two mountains () the location of the man with respect to the mountain. (speed of sound=334 m/s)

Why does lightning follow a jagged path

Gravitational potential energy is often released by burning substances. true or false

A football travels 25 m in 2.5 seconds. What is the speed of the football?

A 25 kg ball is thrown into the air when thrown it's going 10 m/s calculate how high it travels

As part of a circus performance, a man is attempting to throw a dart into an apple which is dropped from an overhead platform. Upon release of the apple, the man has a reflex delay of 215 milliseconds before throwing the dart.

A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it's average speed?

3. A hydraulic lift is used to jack a 950-kg car 45 cm off the floor. The diameter of the output piston is 23 cm, and the input force is 375 N. a. What is the area of the input piston? (10pts) b.