Which quantity in the equation e=mc^2 represents the speed of light?
a. c.
b. s.
c. m.
d. e.

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

What are the dimensions of the cross section that passes through the points a, f, g, and d?

Which type of energy is transferred by convection currents?