What is the energy source of the convection cells in the earth's mantle?

A.

magma pushing through the crust at hot spots

B.

radioactive decay in the earth's interior

C.

gravity acting on the edge of the plates

D.

the sun's energy heating the crust

What is a solenoid? A. a non-magnetic piece of metal B. a straight wire surrounded by an electric current C. a coil of wire with an electric current in it D. one part of a pair of dualnoids

What is the mass of a truck if it produces a force of 14,000n while accelerating at a rate of 5m/s?

The box leaves position x=0 with speed v0. The box is slowed by a constant frictional force until it comes to rest at position x=x1. Find Ff, the magnitude of the average frictional force that acts on the box.

What is the MKS unit for electrical charge

If your friend asked, "why are plastics good insulators," what would be the best reply? electron flow is necessary for electrical current. plastics are able to readily accept electrons, and this makes them good insulators.

Which characteristics are used to identify types of metamorphic rocks? Check all that apply. color foliation rock size grain arrangement type of rock before metamorphosis

What is the current in a 120V circuit if the resistance 10?

What factor causes the seasons? A: Rotation of earth's axis B: The tilt of earth's axis with respect to the sun C: The appearance of the moon D: An eclipse

A golfer on a level fairway hits a ball at an angle of 21° to the horizontal that travels 99 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 99 yd.

What's earths most precious element?