A person with mass 65 kg, standing still, throws an object at 4 m/s. If the

recoil velocity of the person is 3.5 m/s, what is the mass of the object?

Assume the surface to be frictionless.

A sea breeze occurs because warm air rises on land and moves toward the ocean to cool. The cool air then moves from the ocean to be warmed by the land. a. True b. False

If a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a gas. plasma. solid. liquid.

The efficiency of a ramp is 75%. if the amount of work input is 240 j, what is the amount of useful work output?

Which of the following statements describes an overfitted model the best. a. Performs worse on training data as the training process proceeds, while performing better on a held-out test data b.

Acceleration is defined as the rate of change for which characteristic?

If you keep voltage constant and increase resistance resistance, what happens to current?

A scene in a movie has a stuntman falling through a floor onto a bed in the room below. The plan is to have the actor fall on his back, but a researcher has been hired to investigate the safety of this stunt.

During energy transformation, all energy systems: are a. 100 percent efficient b. lose energy c. gain heat energy d. create energy

An apple with a mass of 0.95 kilograms hangs from 3.0 meters above the ground. What is the potential energy of the apple

What is d formula for calculating mechanical power?