A ball drop from 120 m height. How long does it take to hit the ground?

The one factor in an experiment that changes is what

Which best explains why the noble gases are chemically unreactive? They have no valence electrons. They have the same number of protons and electrons. They have more neutrons than protons. They have very stable outer electron shells.

A wave whose wavelength is 3.6 m has a frequency of 910.5 Hz. What is the wavespeed (v) of this wave?

Bernie, whose mass is 70 kg, leaves a ski jump with a velocity of 21 m/s. What is Bernie's momentum as he leaves the ski jump?

True or false when the forces are not balanced an object may keep moving forever

An incident that is caused by sleep and also occurs during sleep is known as a

A person is strolling along a moving walkway at a constant velocity of + 1.00 m/s with respect tot he walkway, which moves at a constant velocity of + 0.50 m/s with respect to the ground.

When a propagule falls into the water, it displaces some water, which causes a small splash

You are watching children play a game of tug-o-war with an old plastic clothesline. The two teams are pulling at opposite ends of the cord and each team is trying to drag the other team into a mud puddle that lies between them.

A Mars rover has a mass of 500 kg. The acceleration due to gravity in mars is about 3.7 m/s^2 and the coefficient of kinetic friction for the rover on the surface is 0.4.