A 10kg rock is pushed off the edge of a bridge 50 meters above the ground. What was the kinetic energy of the rock before it began to fall

Which best describes why a liquid needs a container when a solid does not? Solids fill their containers, and liquide have definite shapes, Solids have definite shapes, and liquida fill their containere, Solids particles do not expand to fill their

Blocks A (mass 3.00 kg) and B (mass 9.00 kg) move on a frictionless, horizontal surface. Initially, block B is at rest and block A is moving toward it at 5.00 m/s. The blocks are equipped with ideal spring bumpers.

Which layer would a person drilling a well most likely reach after drilling through the unsaturated zone? a spring an aquifer the water table an impermeable layer

Which substance has the most thermal energy and will have the most heat flow from it? a stovetop burner on medium (200°C) a nuclear reactor core (1000°C) the human body (36°C) air at room temperature (32°C)

What does it mean for a force to act at a distance?

A wave with a frequency of 30 Hz has a wavelength of 40.5 m. How fast is the wave traveling?

A soccer ball is sitting in the middle of a soccer field during a game. When the referee blows his whistle, one of the players runs toward the ball and kicks it as hard as he can.

A body with v=20m/s changes its speed to 28m/s in 2sec. its acceleration will be

Charge: A piece of plastic has a net charge of + 2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 * 10-19 C)

How much heat is needed to raise the temperature of 6g of water by 18oC?