Energy, work and power Flashcards
what is the law of conservation of energy
energy can neither be created nor destroyed - only converted from one form of energy to another
what is kinetic energy
energy of a moving object
what is gravitational potential energy
energy something gains when you lift it up, and which it looses when it falls
what is elastic energy
energy of a stretched spring or elastic band
what is chemical energy
energy contained in a chemical substance
what is nuclear energy
energy contained in the nucleus of an atom
what is internal energy
energy something has due to its temperature
what is the formula for kinetic energy
mvˆ2/2
what is the formula for gravitational potential energy
gpe = mass x gravitational field x change in height
what are the types of energy stores
elastic, chemical, gpe, and nuclear
what are the types of energy transfers
kinetic, thermal, sound, electrical, light
Sun is the source of energy for …….
for all our energy resources except geothermal,
nuclear and tidal
how is the does the sun provide energy
energy is released by
nuclear fusion in the Sun
formula for efficiency
efficiency = (useful energy output / energy input) × 100%
basically, what is work done
energy transferred
