Physics Exam 1P 2012 Notes - part 2

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  • When areoplane travels faster than speed of light, causes a shock wave or sonic boom. Is it easier for an areoplane to make a sonic boom when it travels higher up?

- Yes, higher because the areoplane does not have to travel as fast 

- the speed of sound is less higher up.

  • LDR resitance graph for light intensity. How does resistance of LDR vary as light intensity changes.

(http://www.gcsescience.com/LDR.gif)

- It is a non-linear relationship.

- There is a lower resistance on LDR as the light falling on it gets brighter.  Resistance decreases ans light intensity increases.

  • Torch is shaken which moves magnet thorugh coil and back again…

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