(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

Read the argument below and answer the question that follows. all football players are required to attend weekly strengthening workshops. david is a football player. david is required to attend weekly strengthening workshops. what are the elements of this argument? a. premise: david is required to attend weekly strengthening workshops. conclusion: david is a football player. b. premise: all football players are required to attend weekly strengthening workshops. conclusion: david is a football player. c. premise: david is a football player. conclusion: david is required to attend weekly strengthening workshops. d. premise: all football players are required to attend weekly strengthening workshops. david is a football player. conclusion: david is required to attend weekly strengthening workshops.