An old-fashioned LP record rotates at 33⅓ .

Question

An old-fashioned LP record rotates at 33⅓ .

What is its frequency in rev/s?

What is its period, in seconds?

Answer 1

The units for these records were rpm, so frequency = 33 1/3 rev/min • (1 min /60 s) = 0 .555... rev/s. Period is the inverse, 1.8 s/ rev.