Chemistry, 18.04.2020 00:39 anonymousgirl2002
1. What are the wavelengths of sound waves at the limits of human hearing - 20 Hz and 20 kHz? The speed of sound in 20 ºC (72 ºF) air is 343 m/s
2. The wavelength of microwaves in an oven is 12 cm. What is the frequency of the waves?
3. What is the frequency of a photon that has a wavelength of 4.87 x 10^7 m?
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