Energy from the sun is produced through atomic explosions on the surface of the sun. Select one:
a. True
b. False

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.