text: you're good if you can answer this,,,? i knew that would get your attention.. hee hee.. anyways... this is the problem.. it's not relly that hard.. i guess..  a compact disc rotates in a player at a constant speed of 200 rpm. what is the cd's (a) frequency? (b) period of revolution?  thanks muches.. the frequency is the revolution, repetition (something _ per minute  therefore in hz   frequency = 200 / 60 = 3.33 hz  now period t = 1 / f     t = 1 / 3.333 = 0.3sec