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1. A tuning fork vibrates 440 times a second. This produces sound waves with a wavelength of 80 centimeters. What is the frequency of these sound waves? Report your answer in units of Hertz.

2. A 6-ohm resistor is connected to a 12 V battery. How much current will flow in this circuit? Report your answer in units of amperes.

3. A 6-ohm resistor is connected to a 12 V battery. What is the power of this circuit? Report your answer in units of watts.

4. An incident light ray strikes a mirror with an angle of 25 degrees to the surface of the mirror. What is the angle of the reflected ray? Report your answer in units of degrees.

5. The speed of light through a transparent substance is measured to be 1.5 x 108 m/s. What is the index of refraction for this substance?

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