Zusammenfassung der Ressource
physics- Energy
- type
- thermal (heat)
- radiator
- kinetic (Movement)
- treadmill
- nucleur
- uranium/ plutonium
- sound
- speakers
- light
- lightbulb
- chemical
- stored energy
- battery
- electrical
- lightning
- gravitational potential
- skydiver
- elastic potential
- rubber band
- energy changes
- to describe an energy change
- 1) write down the starting energy
- 2) drawn an arrow
- write what energy types are given
- all energy is measured in joules (J)
- KJ= 1000J
- for example
- TV set
- changes electrical energy to thermal , sound and light energy
- Energy transfer
- energy cannot be created or destroyed, it can only be changed from one form to another
- for example
- chemical energy in food is converted
to thermal energy and kinetic energy
by our bodies
- car
- chemical fuel --> fuel/ kinetic
+ (wasted) sound and heat
- although energy can never be
created or destroyed, it can be
turned into a form that isn't useful
- we call this
wasted energy
- efficiency (%)
- useful
energy(J)
-------------------
total energy
supplied
- x10
- filament bulb
- = 10%= 10/100x100
- sankey diagrams