Energy Stores And Transfers Flashcards
(16 cards)
Which store of energy is associated with objects raised above the earth’s surface
Gravitational potential energy
Define energy
The ability for something to do work
Define conservation of energy
Can’t be created or destroyed. It can only be transfer between stores.
Unit of Energy
Joules(J)
Identify the energy store associated with hot objects
Thermal energy
Identify the energy store associated with moving objects
kinetic
Identify which energy store is associated with objects that have been stretched
elastic
Identify which store of energy is associated with the nucleus of an atom
Nuclear
Identify which energy store is related with the energy stored between atoms
Chemical
Identify which store of energy is associated with charged or magnetio rsed objects
electromagnetic
Define efficiency
A measure of the useful energy transferred by an object compared to the total amount of energy
DESCRIBE how the efficiency of a machine can be improved
LUBRICANTE moving parts to REDUCE FRICTION
SECURE all SREWS to REDUCE VIBRATIONS
USE STREAMLINE SHAPES
Define power
the amount of energy transferred by an object each second
GIVE the unit of power
Watts(W)
Define efficiency
a measure of the useful energy transferred by an object compared to the total amount of energy it uses
name the different ways of transferring energy ( doing work)
Mechanical work= forces and waves
Electrical work= electric currents
Electromagnetic radiation= light
Heating = conduction and convection
