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6. What is a magnet called when its current can be switched off?

  • An electomagnet
  • A magent

7. What are hydraulics used for in every day life?

  • Car Breaking systems,car jacks, manufacturing, deployment of landing gear.
  • Collecting metal

8. What is the iris ad what's its role in the eye?

  • It is the coloured part of the eye, it controls the intensity of light entering the eye.
  • It is the coloured part of the eye; and does most of the eyes focusing.

9. How do you get the maximum moment?

  • You need to push at right angles perpendicular to the object.
  • You need to push at 180 degrees to the object.

10. Which way does a magnetic field travel?

  • East to West
  • South to North
  • North to south pole
  • South to East

11. Where are images formed?

  • On the lens.
  • On the retina, which is covered in light sensitive cells. These cells detect light and send signals to the brain to be interpreted.
  • On the iris.
  • On the cornea.

12. How is a resultant force made?

  • If the total anticlockwise moments do not equal the total clockwise moments.
  • If the total clockwise moment doesn't equal the total anticlockwise moment.