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