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1) If the current in a wire is at 0.5 A and the voltage is measured at 100 volts, what is the resistance in the wire?
2)What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts?
3)How are sound waves produced, and what impacts do different types of matter have on the speed of the wave?
4)What is the electromagnetic spectrum? Explain and give an example.
5)http://img254.imageshack.us/img254/6528/459431120201182932am187.png
In the figure shown, how could you determine the wavelength?
6)Explain how you can quickly determine whether a string of lights is wired in series or in parallel.

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Ohm's law: I=V/R

See, I dont know how to use Ohm's law

For number one, I=0.5 and V=100

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