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6. State an advantage of digital signals

  • They can take any possible value
  • It's hard to remove interferance
  • They use multiplexing
  • They look nicer than analogue signals

7. What direction do particles move in a longitudinal wave?

  • In a zig-zag motion
  • The particles don't move
  • Back and fouth
  • Up and down

8. True or false, S waves can only travel through solids

  • Ask again later when I have revised
  • True
  • I don't know
  • False

9. What is Specfic heat capacity?

  • The amount of energy eneded to raise the temperature of 1kg of a material by 5 degrees celsius
  • The amount of energy required to raise the temperature of 1kg of a material by 1 degrees celsius
  • The amount of energy needed to set something on fire
  • The amount of energy needed to change the state of 1kg of material

10. What is temperature?

  • A measurement of how hot something is
  • The material the obejct is made from
  • How much energy an object has
  • A measurement of how much mass an object has