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Energy and Forces

Quiz by Horia

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57 questions
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  • Q1
    Conservation of energy
    Energy cannot be created or destroyed it can be transferred
    Energy can be created or destroyed it can't be transferred
    30s
  • Q2
    Units for energy
    Kilograms
    Newtons
    Joules
    30s
  • Q3
    Energy transfers
    mechanically, electrically, heating, radiation
    chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic and nuclear
    30s
  • Q4
    Stores of energy
    mechanically, electrically, heating, radiation
    chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic and nuclear
    30s
  • Q5
    Closed System
    An object or group of objects
    a system in which energy cannot be transferred to and from the environment
    A wave or group of waves
    a system in which energy can be transferred to and from the environment
    30s
  • Q6
    System
    An object or group of objects
    a system in which energy can be transferred to and from the environment
    a system in which energy cannot be transferred to and from the environment
    A wave or group of waves
    30s
  • Q7
    Open System
    a system in which energy cannot be transferred to and from the environment
    An object or group of objects
    a system in which energy can be transferred to and from the environment
    A wave or group of waves
    30s
  • Q8
    How is energy commonly dissipated (wasted) to the environment
    by heating or radiating
    light or sound
    30s
  • Q9
    Is dissipated energy useful or wasted
    useful
    wasted
    30s
  • Q10
    how to reduce dissipation in an open system
    lubrication and thermal insulation
    close it
    30s
  • Q11
    radiation
    the transfer of heat using waves
    the movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currents
    the movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energy
    30s
  • Q12
    conduction
    the transfer of heat using waves
    the movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currents
    the movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energy
    30s
  • Q13
    convection
    the movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currents
    the movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energy
    the transfer of heat using waves
    30s
  • Q14
    Why do we want to reduce the amount of energy wasted?
    because we want to
    To save money and reduce wasted energy
    30s
  • Q15
    what factors increase the rate of thermal energy loss from a house?
    larger temperature difference between in and out, the walls have a larger area, the walls are made of a material which is a thermal conductor, the walls are thin, the walls don't contain insulation
    smaller temperature difference between in and out, the walls have a smaller area, the walls are made of a material which is a thermal insulator, the walls are thick, the walls don't contain conduction
    30s

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