With a wave, the amount of compression from the equilibrium position is termed the
a) transverse; amplitude
b) transverse; wavelength
c) longitudinal; amplitude
d) longitudinal; wavelength

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

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