How would the gravitational force between the earth and the moon change if the moon had twice the mass?

What occurs during a combustion reaction

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.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine