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  • Energy Transfers and Stores (Energy 1)
  • If 1000 J of energy is put into a machine that has an eff...
Multiple choice

If 1000 J of energy is put into a machine that has an efficiency of 0.55, how much energy is usefully transferred?

  1. 55 J

  2. 450 J

  3. 550 J

  4. 45 J

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Useful energy = total energy input * efficiency. 1000 J * 0.55 = 550 J.

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