What is the mass of a falling rock if it hits the ground with a force of 147 newtons?

Thermal energy from the sun travels to earth by?

Discuss the use of headrests in the seats in a car in terms of newtons laws. Use terms and provide a comprehensive in depth answer with references.

What are the properties of the water molecules when the water evaporates?

Which of the following is a reasonable criticism of the Bohr model of the atom? Select one: a. It makes no attempt to explain why the negative electron does not eventually fall into the positive nucleus. b.

a source is producing 15 waves in 3.0. s the distance between a crest and a trough is 10.0 find the frequency the wave length and the velocity of the wave

Which of the following describes subatomic particles? carbon and nitrogen solids, liquids, gases larger than atoms protons, neutrons, and electrons

What is the difference between speed and velocity? A) velocity describes speed with direction. B) there is no difference. C) Velocity describes direction with position. D) Velocity is used in space, while speed is used on earth.

How do you calculate resistance with coulombs, time and J's?

Difference between specific heat capacity and latent heat?

What are artificial magnets and natural magnets? examples