Awashing machine drum 90.0 cm in diameter starts from rest and achieves 1200.0 rev/min in 24.0 s. assume the acceleration of the drum is constant. 1) calculate the magnitude of the net acceleration of a point on the drum after 1.00 s has elapsed. (express your answer to three significant figures.)

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.