Which describes time dilation? the faster an object moves, the more stretched time becomes. the more slowly an object moves, the more stretched time becomes. the faster an object moves, the more time it takes for light to travel a given distance. the faster an object moves, the less time it takes for light to travel a given distance.

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

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.