List down 5 sources of heat energy.

Here are the useful and wasted energy forms for each object:

• 1. Torch:

  • Useful energy: Light energy
  • Wasted energy: Heat energy

• 2. Radio:

  • Useful energy: Sound energy
  • Wasted energy: Heat energy

• 3. Light bulb:

  • Useful energy: Light energy
  • Wasted energy: Heat energy

• 4. Car engine:

  • Useful energy: Kinetic energy (mechanical energy)
  • Wasted energy: Heat energy, Sound energy

• 5. Pump:

  • Useful energy: Kinetic energy (of fluid)
  • Wasted energy: Heat energy, Sound energy

• 6. Candle:

  • Useful energy: Light energy
  • Wasted energy: Heat energy, Smoke/Soot