physics

• what is a resultant force?

  the single force that can replace all the other forces
• what is the vector qualities?

  direction and magnitude
• what is a force?


  push or pull
• what is scalar quality?

  magnitude
• what is a fossil fuel

  a fuel that’s formed from dead organisms
• what is global warming

  the rise in the average temperature of the earth
• what are the greenhouse gases


  methane and carbon dioxide and water vapour
• what is the greenhouse effect

  the sun gives out short wave radiation the earth absorbs it this emits back out long waves
• effects of global climate change

  habitat loss, flooding, wildfire, rising sea levels, melting polar ice caps
• non contact forces

  gravitational , magnetic, electrostatic
• contact forces 


  friction, air resistance, tension, the normal contact force
• what are forces measured in

  newtons
• transverse waves


  oscillations perpendicular to the direction of energy transfer
• longitudinal waves


  oscillations parallel to the direction of energy transfer
• wavelength


  distance between the same point on two adjacent waves
• wavespeed


  the speed at which energy is transferred
• independent variable


  the thing you change
• dependant variable 


  the thing you measure
• control variable


  the thing you keep the same
• what are the electromagnetic waves

  radio, microwaves, infrared radiation, visible light, ultra violet, x-rays, gamma rays
• magnetic field


  region around a magnet that acts on another magnet or magnetic material
• permanent magnet


  produce their own magnetic field
• induced magnet


  turn into a magnet when they are put into a magnetic field
• contact force


  the objects are actually touching
• non-contact forces


  the objects are not touching
• frequency


  the number of waves passing a fixed position per second
• frequency is measured in

  hertz
• amplitude


  the maximum displacement that any particles achieves from its undisturbed position in meters
• period


  the time taken for one complete oscillation in seconds
• what is a diode?

  a component which only allows current to flow in one direction
• 2 features of a plug that have been designed to increase safety:

  plastic insulation, colour coded wires
• why would an exposed wire cause someone to get an electric shock?

  The live wire may come exposed, the current could pass through the human body , the potential of the live wire is 230 v while the potential of the human body is 0 v
• ways to minimise hazards caused by working with radioactive metals

  wear protective clothing/ face masks, limit exposure, avoid contact with skin
• why is it important research on radiation is shared

  so they can be checked by peer review
• specific heat capacity


  the energy required to increase the temperature of 1kg of a substance by 1 degree
• specific latent heat


  the energy required to change the state of 1kg of a substance