A 20 g. book is sitting on a shelf that is 3.0 meters off the ground. Kinetic energy is found using the formula 1/2 x mass x speed. Potential energy is found by taking mass x g x height, with g as the
constant, 9.8 m/s? What is needed to determine the book's mechanical energy as it sits on the shelf?

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.