Which of the following is constant in the universe?

a. total entropy
b. total energy
c. total temperature
d. total heat

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these