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1. A sound wave has a frequency of 12 Hz. If its wavelength is 15 meters, how fast does it travel in m/s?
2. What is the wavelength of a light that travels with a speed of 3 x 10⁸ m/s and a frequency of 7 x 10¹⁴ Hz? (Sample Answer Format: 5 x 10^-3)

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