An old-fashioned LP record rotates at 33⅓ rpm
1. What is its frequency in rev/s?
2. What is its period, in seconds?
[33 + 1/3] / 60 = [100/3] / 60 = 100/180 = 5/9 revs per second
If it spins at 5/9 revs per second, then it takes 9/5 sec to make a full rotation....and this is the period
