In a pipe closed at one end and filled with air, a 384-Hz tuning fork resonates when the pipe is 22 cm long; this tuning fork does not resonate for any smaller pipes. a. State three other lengths at which this pipe will resonate with the 384-Hz tuning fork. b. The end of the pipe that was closed is now opened, so that the pope is open at both ends. Describe any changes in the lengths of pipe that will resonate with the 384-Hz tuning fork. c. The air in the closed pipe is replaced with helium. Describe an experiment that would use the pipe to determine the speed of sound in helium.