A uniform sphere of radius R rotates about a diameter with angular momentum of magnitude L. Under the action of internal forces, the sphere collapses to a uniform sphere of radius R/2. The magnitude of its new angular momentum is:

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

What is the single most important equation in all of physics?