4-27-09

Cory Miller Class started and only half of the class was there because the juniors had PSSAs. So the seniors worked on 5 problems the whole period. Problem 3 stated: What is the wavelength of a 340 Hz tone in air at a temperature of 20 degrees Celsius? First i wrote down that we need to find the wavelength, the frequency is 340 Hz, and the temperature is 20 degrees Celsius. First i multiplied the temperature of 20 times 0.6 to equal 12 m/s. I plugged what I know in the equation of velocity equaling 331m/s @ 0º C (±0.6 m/s of each 1ºC). And added 12 m/s to 331 m/s and equaled 343 m/s. So the equation is 343 m/s @ 20ºC. Then I plugged it into the equation of 343 equaling 340 times the wavelength. So I divided each side by 340 and found out that the wavelength of the wave equals 1 meter.