physics deck Flashcards
name of the energy emitted through movement
kinetic
name the energy emitted by stretching something
elastic potential
define energy
the ability to do work
what is the special rule of energy
it is only converted or conserved, never created or destroy
name the energy related to objects being on shelves and tables
gravitational potential
temperature
measure of the average kinetic energy
specific heat capacity
amount of heat needed to change 1kg of an object by one degree celsius
m
symbol for mass
c
symbol for specific heat capacity
joules
the unit for energy and work
efficiency
measure of how good an object is based on their ability to transfer input energy to useful output energy
efficiency calculation
useful output over total energy input
percentage efficiency
found by multiplying the efficiency by 100
why can’t you have an efficiency higher than 1/100
it would be breaking the laws of energy conservation
reasons devices waste energy
unnecessary heat, light or sound
