In which calculation would the use of the mass-energy equivalence principle be needed? A. energy obtained from the burning of fossil fuels B. energy given off by a current flowing through a wire C. energy created by the conversion of mass of a uranium sample D. mass of coal burned in order to provide the energy needed for a large city

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.