Acar moves around a circular track at a constant rate. what must change? a. only it's speed b. only it's velocity c. both its speed and it's velocity

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.

How to tell if a molecule is polar or nonpolar with electronegativity

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in