Energy, Chp. 1 Flashcards
(27 cards)
Mass Energy
the energy stored in the mass of an object
Heat Energy
the kinetic energy of molecules
Electric Energy
is not an energy source, it’s a convenient way to transmit and use energy
Potential Energy
is energy due to position
Chemical Energy
the energy stored in chemical bonds of molecules
Fossil Fuels
non-renewable energy sources: coal, oil, natural gas
Renewable Energy
solar, tidal, geothermal
Geothermal
heat from Earth’s interior
Hydroelectric
the electricity generated by the power of flowing water
Principle of Energy Conservation
energy cannot be created or destroyed, it can change from one form to another
Joule
the metric unit of energy
British Thermal Unit
it’s a relatively large amount, is based on the amount of heat energy given to a known amount of water to increase its temperature
The calorie
the amount of energy required to raise the temperature of one gram of water by one degree celsius.
The Calorie
1000 time larger than the calorie
The Foot-Pound
a useful unit for energy, foot=distance and pound=force
Electromagnetic Radiation
how energy radiated by the sun travels to Earth and elsewhere, includes the spectrum
Energy Conservation
using less energy in industry, transportation, commercial, residential
Nuclear Fission
a nucleus splitting into smaller parts
Nuclear Fusion
when two or more nuclei collide forming a new type of nucleus
Watt
unit of power, the rate at which energy is used
Horsepower
unit of measurement of power, the rate at which work is done.
Work
force times the distance through which the force acts, like pushing an object through a rough surface
Mechanical Energy
the sum of potential and kinetic energy
Energy Efficiency
using less energy to provide the same service
