How much heat is absorbed by 60 g of copper (c=385 J/kg K) when it is heated from 20°C to 80°C?

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.

Avoltaic cell converts chemical energy to

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?