physics- Energy

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

Resumo de Recurso

	Criado por DJ AD mais de 8 anos atrás