English, 20.06.2020 23:57 miguel454545

(a) Compute the speed of sound waves in air at room temperature (T=20°C) and find the range of .wavelengths in air to which the human ear (which can hear frequencies in the range of 20 –
20,000Hz) is sensitive. The mean molar mass of air (a mixture of principally nitrogen and
oxygen) is 28.8 x 10-kg/mol and the ratio of heat capacity is Y = 1.40.
(b) If the Lead City F. M station broadcasts at a 107.5 MHz with a radiated power of 65.0kW
i.
i.
What is the magnitude of the moment of each photon?
How many photons does Lead City F. M station emit each second?
(C) Define the term blackbody? State Wien's displacement law.
The surface of the sun has a temperature of about 5800K. To a good approximation we may treat
it as a blackbody

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(a) Compute the speed of sound waves in air at room temperature (T=20°C) and find the range of .wav...

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