Use newton's first law to explain why book on a desk does not move

A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

Which force is most directly responsible for radioactive beta decay? electromagnetic force strong interaction gravitational interactions weak interaction

At what temperature will the volume be 15.50 L if the pressure is 871 torr?

How long does it take an acorn to hit the ground after dropping from the branch of a tree 50.0m high? remember that g=9.8m/s^2

A box slides down a ramp. Which statement is true about the kinetic and potential energy of the box? Its potential energy increases and kinetic energy decreases. Its potential energy decreases and kinetic energy increases.

Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle's scrap metal yard.

A flight attendant pulls a 60.0 N flight bag a distance of 239.0 m along a level airport floor at a constant speed. A 21.0 N force is exerted on the bag at an angle of 66.0 degrees above the horizontal. How much work is done on the flight bag?

A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?

This is a machine consisting of two wheels of different sizes that rotate together. It is a modified lever.

A source from which organisms generally take elements is called a/an A. biotic community. B. reservoir. C. exchange pool. D. food web.