7. Using 343m/s as the speed of sound, A) find the lowest frequency that can be played on an instrument having a open pipe 55cmlong. B) What would the frequency be if the temperature in the room was 65"?? C)80"F? 7A 73 7C 8. What is the next to lowest frequency that can be played on an instrument that is on agen pipe 75cm long At 24"C? 9 . Two sources emit frequencies of 545Hz and 548Hz simultaneously. What beat frequency will be heard ? 9. 10. Two horns emit sounds of wavelength 2m and 2.4m . if sound travels at 341m/s, what is the number of beats heard each second? 10 . 11. What is the fundamental frequency and the first two overtones of a 35cm pipe with a closed end? Assume sound travels at 345m/s? 11a) 11b) 11c) 12. A pipe open at both ends is 55mc long. What are the wavelengths of the fundamental and the first three overtones? 12a) 12b) 12C) 12d)