Tonicha Robinson P2

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Author:
McAuley
ID:
143123
Filename:
Tonicha Robinson P2
Updated:
2012-03-22 10:23:58
Tags:
Physics science
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Description:
Physics revision
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  1. What is speed?
    How fast something is going.
  2. Speed =
    Distance over time.
  3. What is speed is measured in?
    Metres per seconds (m/s).
  4. What is mass?
    How many atoms are inside an object.
  5. What is weight?
    The amount of force pulling something down.
  6. Weight =
    Mass x Gravitatonal acceleration.
  7. Force =
    Mass x acceleration.
  8. Stopping distance =
    Thinking distance + breaking distance.
  9. What factors affect stopping disatnce?
    1-Poor maintained vehicles eg; Worn brakes.
  10. What is terminal velocity?
    When forces on an object are balanced.
  11. Why is lightning dangerous?
    Electrical impuses can pass through the human body and kill you.
  12. What do fuses protect?
    People and machinery.
  13. What do fuses protect people from?
    Power surges.
  14. Why are plugs made of plastic?
    Plastic is an insulator, there for it does not conduct electricity. Also plastic does not melt.
  15. Whats does a diode do?
    Allows the current to flow in one direction only.
  16. What is an isotope?
    Same protons but different neutrons.
  17. What causes background radiation?
    Animals, rocks, plants and soil.
  18. What are aplha particles made of?
    2 protons, 2 neutrons and helium.
  19. What are beta particles made of?
    High speed electrons.
  20. What is static electricity?
    When two different objects rub together.

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