Which law can be used to calculate the number of moles of a contained gas?
a. boyle’s law
c. ideal gas law
b. combined gas law
d. charles’s law

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

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.