Which of the following is a chemical change?
a. freezing water
b. melting ice
c....
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Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
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If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false
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Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?
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The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength
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