A 440-Hz tuning fork is now used with a closed-end tube resonating column to determine the velocity of sound in a different gas than air. If the spacings between resonances are 1.10 m, what is the velocity of sound in this medium?

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.