The value of gravitational acceleration of a body on Earth is 9.8 meters/second2. The gravitational potential energy for a 1.00 kilogram
object is found to be 12.5 joules. How high is this object above the ground level, where PE = 0?
O A. 1.3 meters
OB. 3.5 meters
OC. 2.0 meters
OD. 5.6 meters
O E. 7.9 meters

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.