What causes the global convection currents between the equator and the poles?

Imagine two artifical satellites with equal masses orbiting earth. One satellite is orbiting closer to earth than the other satellite.

A car goes from a velocity zero to a velocity of 15 meters per second East in 2.1 seconds. What is the car's acceleration?

When a Car slows down the brakes gets hot. Use energy Ideas to explain?

Why does a metal spoon left on a bowl of hot soup become warm? A) Metal is a conductor. B) Metal is an insulator. C) Metal produces its own heat. D) Metal heats up from magnetism.

A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10*104 m/s2, and 1.85 ms (1 ms = 10-3 s) elapses from the time the ball first touches the mitt until it stops, what was the initial velocity of the ball?

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N