How hot is the surface of the sun (in degrees celsius)?
a. 6 thousand degree
b. 10 thousand degree
c. 6 million degree
d. 13 thousand degrees
e. 10 million degrees

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

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.

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance