Energy Efficiency Test Study Guide Flashcards
(14 cards)
force
a push or pull
work
a form of energy that is the product of force and distance when both force and distance are in the same direction
Power
the rate at which work is done and which is measured watts or joules per second
Energy
a measure of a system’s ability to change or create change in other systems
Potential Energy
stored energy that comes from position
Kinetic Energy
energry that comes from the motioned is related to mass a velocity
Efficiency
the ratio of a machine’s output work to its input work
Output Energy vs. Input Energy
Potential vs. Kinetic energy
Thermodynamics
the branch of physics that deals with heat, energy, and work
First Law of Thermodynamics
the law of conservation of energy: Energy cannot be created or destroyed, only converted from on form into another
Second Law of Thermodynamics
when works done by heat flowing, the output work must be less then the amount of heat flowing
Entropy
a measure of the energy in a system used for everyday measurements in the United States
Kilowatt-hours(kWh)
1 kilowatt or 1000 watts
Electrical Power
the rate at which electrical energy is changed into other forms of energy
