A 20.0-kg rock is dropped and hits the ground at a speed of 90.0 m/s. Calculate the rock's gravitational potential energy before it was dropped. (Ignore the effects of friction.)

A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4m. determine the acceleration of the bike.

Why are chemicals and hot objects never placed directly on the balance pan?

Your employer asks you to build a 26-cm-long solenoid with an interior field of 4.1 mT. The specifications call for a single layer of wire, wound with the coils as close together as possible. You have two spools of wire available.

How many cubic feet are there in a gallon?

A 45 kg student runs up a flight of stairs that are 3.2 m high in 2 seconds. How much power did the student use during this time? 706 W 288 W 72 W 7.0 W

You and your housemate have an argument over the cost of the electric bill. You want to turn off the outside porch light before going to bed each night.

Work is a product of A force and distance B force and heat energy C cause and heat energy D cause and effect

An exploration submarine should be able to descend 1200 m down in the ocean. If the ocean density is 1020 kg/m3, what is the maximum pressure on the submarine hull?

Why cooking pans don't have have metal handles?

Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band