The diagram below is meant to show refraction of a sound wave as it passes from one medium into another. The lines represent each compression in the
sound wave. Which of the following does not occur as the wave passes from
the blue into the white medium?
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A. The wave speed changes.
B. The frequency changes.
c. The wavelength changes.
D. The direction of wave motion changes.

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.

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created