Mr. moyers class was studying how work is done on an object in which situation is the amount of work done on the object equal to zero? A shopper pushes a cart with a broken wheel. B a person pushing a heavy box and unable to move it. C an apple growing on a tree and falls to the ground. D and athletes swing a bat into the air without hitting anything

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

If we relied solely on the nonrenewable resources found in the u. s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system