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..
2006-11-06 22:47:44 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Physics
oops.. **really** wrong spelling^^..
2006-11-06 22:54:19 · update #1
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
2006-11-06 22:58:54 · answer #1 · answered by Emmanuel P 3 · 0⤊ 0⤋
Angular speed = 200rpm = 200 * 2 * pi radians per minute
=> 2 * pi *f = 200 * 2 * pi / 60 radians per second
=> f = 200/60
Period of revolution = (2 * pi)/(Angular Speed)
= (2 * pi ) / ((200 * 2 * pi)/60)
= 60/200 ( or Simply 1/f)
2006-11-06 22:54:17 · answer #2 · answered by Anonymous · 1⤊ 0⤋
(a) Frequency -> revolutions per second
200 rev per minute = 200 / 60 rev per second = 3.33 Hz
(b) Period of revolution = 1 / frequency = 60 / 200 seconds
2006-11-06 23:03:39 · answer #3 · answered by Sangeet 2 · 0⤊ 0⤋
Frequency 3.33Hz (200rpm/60sec=3.33Hz). Period of revolution is 300 ms (milli seconds); (1000ms/(200rpm/60sec))=300ms
2006-11-06 23:06:35 · answer #4 · answered by geomoto 2 · 0⤊ 0⤋
If time unit is seconds...
frequency
200/1min
=200/60s
=3.33r/s
Period= 1/frequency
=1/3.33
=.3003
2006-11-06 22:57:03 · answer #5 · answered by siddharthm91 2 · 0⤊ 0⤋
U have got our attention, but I am sure u might not get many answers...
2006-11-06 22:59:15 · answer #6 · answered by Anonymous · 0⤊ 0⤋
I think 60/200 is the answer. Thanks for the two points.
2006-11-06 23:17:48 · answer #7 · answered by Anonymous · 0⤊ 0⤋
what?
the cr is what?
i really can't understand but i gat to tell you it really got my attention
2006-11-06 22:50:56 · answer #8 · answered by Donets'k 5 · 0⤊ 0⤋
frequency-number of times the disc rotates per unit time.-200
por-the time taken by the disc 2 rotate once.-(find it out...!)
got wat u wanted.........?
2006-11-06 22:59:20 · answer #9 · answered by Kishore 3 · 0⤊ 0⤋
(a)200rpm or 3.1/3rps
(b)0.3s
2006-11-06 22:57:11 · answer #10 · answered by Dr D 1 · 0⤊ 0⤋