A girl jogs around a horizontally circle with a constant speed. She travels one fourth of a revolution, a distance of 20.8 m along the circumference of the circle, in 5.7 s. The magnitude of her acceleration is m/s2. Round your answer to the nearest tenth. Do not use scientific notation.

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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.

What is an aquifer for science class