3. Energy Basics Energy: the capacity to do work Work: the product of force times the distance through which the force acts Both the force and the distance must have nonzero values if work is to be done Forms of Energy: Chemical Energy: energy stored in certain chemicals or materials that can be released by chemical reaction often combustion Heat Energy: energy associated with random molecular motions within any medium. Heat energy is related to the concept of temperature Mass Energy: mass-energy equivalence discovered by albert Einstein is the concept that the mass of a body is a measure of its energy content E=mc2(△E=△mc2), Nuclear reactions in the sun D+ T-He n+ Energy, with 7%less mass, 4 million tons of Hydrogen/second3. Energy Basics Energy: the capacity to do work Work: the product of force times the distance through which the force acts. Both the force and the distance must have nonzero values if work is to be done. Forms of Energy: Chemical Energy: energy stored in certain chemicals or materials that can be released by chemical reaction, often combustion. Heat Energy: energy associated with random molecular motions within any medium. Heat energy is related to the concept of temperature. Mass Energy: mass–energy equivalence discovered by Albert Einstein is the concept that the mass of a body is a measure of its energy content. E = mc2 (ΔE = Δ mc2), Nuclear reactions in the sun: D + T → He + n + Energy, with 7% less mass, 4 million tons of Hydrogen/second