Energy Flashcards Preview

Physics > Energy > Flashcards

Flashcards in Energy Deck (18)
Loading flashcards...
1
Q

Name the nine types of energy

A
  1. Electrical
  2. Light
  3. Sound
  4. Kinetic
  5. Nuclear
  6. Thermal
  7. Gravitational potential energy
  8. Elastic potential energy
  9. Chemical
2
Q

What makes an efficient device

A

The less energy wasted the more efficient it is

3
Q

Sankey diagrams

A

They are used to show how much input energy is usefully compared with how much is wasted

4
Q

Radiation

A

Transfer of heat energy by electromagnetic waves and the emission of thermal radiation that occurs in solid liquids and gases

5
Q

Conduction

A

Where vibrating particles pass on their extra kinetic energy to neighbouring particles

6
Q

Convection

A

Transfer of energy by the more energetic particles moving from the hotter region to the cooler region

7
Q

Objects and heat radiation

A
  1. An objects that’s hotter than its surroundings emit more radiation than it absorbs
  2. An object that’s cooler than its surroundings absorbs more radiation than it emits
8
Q

Loft insulation

A

Fibreglass wool prevents heat loss by conduction and radiation

9
Q

Double glazing

A

Two layers of glass with a narrow gap between reduces conduction and convection

10
Q

Draught proofing

A

Strips of foam around doors and window prevents convection

11
Q

Cavity wall undulations

A

Foam squirted between bricks stop convection and radiation but prevents conduction

12
Q

Work

A

When a force moves an object, energy is transferred and work is done

13
Q

Power

A

The rate at which something is done

14
Q

Features of non-renewable energy

A
  1. They will run out
  2. Damage the environment
  3. Supply most of our energy
15
Q

Typical power station

A
  1. Fuel
  2. Boiler
  3. Turbine
  4. Generator
  5. Grid
16
Q

Features of geothermal energy

A
  1. Only possible when hit rock lie near the surface

2. Water pumped down tot eh hot rocks and are forced up due to pressure which drives the generator etc

17
Q

Wave energy

A
  1. Wave coverters are dotted around the coast
  2. The up and down motion drives generators
  3. Kinetic energy of waves is converted to electrical energy
18
Q

Generating electricity through water

A
  1. Tidal barriers are big damns with turbines in them
  2. Tide comes in and the water is allowed out at a controlled speed
  3. Drives the turbine
  4. Kinetic energy is converted to electrical energy