In an electrical circuit, which of the following controls whether or not electrons flow through the circuit?

Which of the following would not be taken into consideration when describing the quality of a sound

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.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt