Cards (98)

  • extension is directly proportional to force applied
  • there is a limit to proportionality where the elastic object wont return to its original shape
  • specific heat capacity is the amount of energy required to raise 1kg of a substance by 1 degree
  • change in thermal energy = mass x specific heat capacity x change in temperature
  • work done = force x distance
  • a system is a group of objects
  • what is a system
    a group of objects
  • what is energy measured in
    joules ( J )
  • food fuels and chemical cells store energy
    chemically
  • hot objects store energy
    thermally
  • moving objects store ------- energy
    kinetic
  • objects that can elastically deform store ------- energy
    elastic
  • objects that have been lifted up store -----------
    gravitational potential energy
  • magnetic objects or objects that are in or near a magnetic field store -------- energy
    magnetic
  • the nucleus of atoms and radioactive materials store ------ energy
    nuclear
  • charged objects store

    electrostatic energy
  • what are all the energy stores
    chemical , thermal , kinetic , elastic potential , gravitational potential , , magnetic , nuclear , electrostatic
  • what are the four energy transfers
    heating , mechanically , electrically , radiation
  • when a force moves an object work is done
  • work done = force x distance
  • what is force measured in
    newtons
  • what are the none renewable energy resources
    crude oil , gas , coal
  • how do fossil fuels generate electricity
    burn fuel - heat water - turn turbine - turn generator -
  • what is a renewable energy resource
    one that can be replenished as it is used
  • what are the renewable energy resources
    wind , solar, hydroelectric , tidal , biofuels , geothermal , wave power
  • advantages of renewable energy resources
    will never run out
    don't add carbon dioxide to the atmosphere
  • disadvantages of renewable energy
    not always reliable ( wind and solar )
    can destroy habitats ( hydroelectric )
    only suitable in certain climates
  • a lot of energy is used in the UK for transport and most renewable energy resources generate electricity
  • biofuels are carbon neutral
  • what is the problem with biofuels
    if we use land to grow crops for fuel it could increases the price of food
  • what does carbon neutral mean
    achieving net zero carbon emissions by balancing the amount of carbon released with its offset
  • kinetic energy is the energy stored in moving objects
  • what is kinetic energy?
    the energy stored in moving objects
  • what energy is stored in moving objects?
    kinetic
  • kinetic energy = 0.5 x mass ( kg ) x speed ( m/s) squared
  • kinetic energy = ...
    0.5 x mass x speed squared
  • elastic potential energy is the energy stored in a stretched spring or elastic object
  • whats is elastic potential energy
    the energy stored in a stretched spring or elastic object
  • when a spring reaches its limit of proportionality it wont go back to its original shape
  • what happens when i spring reaches its limit of proportionality
    it doesnt return to its original shape