1)     To tune a cello string to 220 Hz, you compare its frequency

with a 220-Hz tuning fork.  Initially, you hear a beat frequency of 6 Hz.  Then you slowly tighten the guitar string, which increases its frequency.  As a result, the beat frequency decreases steadily to 2 Hz.  What are the initial and final frequencies of the guitar string?

1)     If the distance to the water level in a well is doubled, is the time it takes to hear the splash twice what it was before, more than twice, or less than twice?  Explain your answer.