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Energy transfer

  • Game Code: 154251
  •  English    43     Public
    Energy transfer
  •   Study   Slideshow
  • By What process does heat energy move through a gas or liquid?
    Convection
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  • By what process does heat energy move through a vacuum?
    Radiation
  •  15
  • A toaster transfers electrical to thermal and light. Which type of energy is considered wasted?
    Light
  •  15
  • A laptop transfers electrical energy to light, sound and thermal. Which type of energy is considered wasted?
    Thermal
  •  15
  • What is "work done"?
    The energy transferred by a force.
  •  15
  • How do you calculate the amount of "work done" when doing a deadlift?
    Work done (J) = Force (N) x distance (m)
  •  15
  • A cyclist uses their brakes. What are you calculating if you times the friction force by the distance covered whilst braking?
    Work done / energy transferred [Work done = force x distance]
  •  15
  • A crane lifts a 1000N payload 25m upwards. How much "work" has the crane done?
    25,000 J Work done = force x distance.
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  • You're on the squat rack. You transfer 1500 J of energy (work done) in 2 seconds. What is your power?
    750W [ Power = work done / time ]
  •  15
  • You're curling dumbells. You transfer 110 J of energy (work done) in 2 seconds. What is your power?
    55 W [ power = work done / time ]
  •  15
  • Power is the rate of work done. [True/false]
    True
  •  15
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