Letter M

MECHANICAL ENERGY - Energy produced by physical force.

MEGA - One thousand.

METHANE (CH4) - The simplest of hydrocarbons and the principal constituent of natural gas. Pure methane has a heating value of 1,1012 Btu per standard cubic foot.

METHANOL (also known as Methyl Alcohol, Wood Alcohol, CH3OH) - A liquid formed by catalytically combining carbon monoxide (CO) with hydrogen (H2) in a 1:2 ratio, under high temperature and pressure. Commercially, it is typically made by steam reforming natural gas. Also formed in the destructive distillation of wood.

MICROWAVE - Electromagnetic radiation with wavelengths of a few centimeters. It falls between infrared and radio wavelengths on the electromagnetic spectrum. The radio wave beam can deliver electrical energy over long distances.

MULTIMETER - An instrument used for a variety of electrical measurements, including current, voltage and resistance.