A geologist estimates that a large boulder weighs 7840 N. What should he estimate the mass of this boulder to be? A. 650 kg B. 740 kg C. 780 kg D. 800 kg

What is the kinetic energy of a car of 1500 kg moving 25 m/s?

Which statement best describes the long-term effects of using renewable resources? A) There is an unlimited supply of fresh water on the Earth. B) Melting glacier ice will supple more fresh water.

Did Benjamin Franklin prove that light is electric

When the distance between two stars decreases by one-third, the force between them?

Photons are also known as beta particles. (true or false)

Which of the following statements are true? Check all that apply. O A positive charge and a negative charge attract each other. O Electric charge is conserved. O Two positive charges attract each other. O A neutral object contains no charge.

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. if the force you apply has a magnitude of 86 n, what is the cart's acceleration? assume negligible friction.

Two objects are made of the same material, but they have different masses and temperatures. If the objects are brought into thermal contact, which one will have the greater temperature change

A ball strikes a wall. It exerts a force of 10 N to the left against the wall and bounces off. What force does the wall exert on the ball?

A car slows down from 24 m/s to rest in a distance of 90 m. what was its acceleration, assumed constant? incorrect: your answer is incorrect. m/s2