Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
energy 4.1
| what is a system? | an object or a group of objects |
| describe the changes in energy involved when a system is changed by heating | - heating causes energy stored within a system by increasing the energy of the particles that make it up -either raises the system’s temp or provides change of state e.g heating a pan |
| what is work done with energy? | when energy is transferred from one store to another |
| describe the changes in energy involved when a system is changed by work done by forces | when force causes object to move, work is done against frictional forces causing objects temp to increase + energy is lost as heat and sound to surroundings e.g human rubs hands to get warm |
| what is a current and how does the work done by its flow change energy in a system | current is a flow of charge and flows when there is a potential difference applied to circuit (provided by cell or power supplier) -gives each charge an amount of energy (work done by power supply as flows) e.g lighting bulb from battery |
Created by:
elisseu
Popular Physics sets