A 100kg bag of sand has a weight on 100 N. When dropped it's acceleration is what?

Why do we need to use telescopes that are sensitive to other types of radiation

You input 75 J of work with a wedge. If the wedge does 65 J of useful work, what if the efficiency of the wedge?

A clothes dryer uses about 4 amps of current from a 240 volt line. How much power does it use?

As a positively charged object moves toward a negatively charged object, their potential energy increases. As a positively charged object moves toward another positively charged object, their potential energy increases.

State Stoke's theorem

A book falls of the table and hits the floor. Is work done? Why?

A person of 83 kg is in an elevator. If the elevator is moving at a speed of 5 m/s, what's the person's kinetic energy? Keep 4 significant figures a 1,004 J b 1,038 c 1,280 J d 980 J e 1,435 J

What two equations can be used to determine the speed of a wave

Which force has an infinite range and is always attractive?

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp