A pole 4m long is laid along the principal axis of a convex mirror of focal length 1m. the end of the pole nearer the mirror is 2m from it. find the length of the image of the pole. pole.

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

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.

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.