a person sits on a stool in science class. They weigh 145 pounds. What force does the stool excerpt on the person to prevent them from crushing the stool?

Volcanism is more likely on a planet that Volcanism is more likely on a planet that has high internal temperatures. is struck often by meteors and solar system debris. doesn't have an atmosphere or oceans. is closer to the Sun.

If an average cloud has a density of 0.5 g/m3 and has a volume of 1,000,000,000 m3, what is the weight of an average cloud

What is true of all places on earth during the equinoxes

A 13 g bullet traveling 213 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 152m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

The carnival ride has a 2.0m radius and rotates 1.1 times persecond. a. Find the speed of a rider. b. Find the centripetal acceleration of a rider. c. What produces this acceleration? d. When the floor drops down riders are held up byfriction.

You need to raise a heavy block by pulling it with a massless rope. You can either (a) pull the block straight up height h, or (b) pull it up a long, frictionless plane inclined at a 15∘ angle until its height has increased by h.

A 320-m length of wire stretches between two towers and carries a 120-a current. determine the magnitude of the force on the wire due to the earth's magnetic field of 5.0 * 10-5t which makes an angle of 60 ∘ with the wire.

Light acts like a. a wave. b. a particle. c. neither a wave nor a particle. d. both a wave and a particle.

A uniform rope of length L and negligible stiffness hangs from a solid fixture in the ceiling. The free lower end of the rope is struck sharply at time t=0.

A 62 pound box is on an incline. Determine the minimum force P that would result in the box starting to slide up the incline. (include units with answer)