here are some possible energy outputs depending on the degree of friction:
Heat energy- always
Sound energy
light energy(sparks)
no, the sun creates the most but wind energy creates the second highest amount of energy.
Mitochondria within the cell creates energy for the cell through Electron cycle.
One is Duke Energy
the sun
Mitochondria generates most of the cell's energy in form of ATP.
Batteries maybe?
mitochondria
mitochondria in the cells
Mass and/or Energy
Mitochondria
When you burn the gas, it explodes, and creates energy.
Energy creates heat