Exam Problem: Rounds per minute into Megabits per second

  • #1
Ramses The Pharaoh
17
0
Hi, guys! :approve:
My exam comes in one week, so I need your urgent help :cry:
I found out, that one of the problems in the exam will be about convertion between rounds per minute (of a CD or HDD) and megabits per second (as reading speed). I have no idea what is the dependence between those two measures. :confused: Does anyone of you know a formula for convertion or have any clues how to derive such a formula.... Help?!
Greatly appreciate your concern :smile:
 

Answers and Replies

  • #2
WhirlwindMonk
25
0
You would need to find out how many megabits can be read in one revolution. Then it should be pretty easy, but without that information, I have a feeling this problem is impossible.
 
  • #3
Ramses The Pharaoh
17
0
OK, if the question asks about how many megabits are read in one revolution, you say that "it should be pretty easy". Still, it is very foggy for me :-). Perhaps you could provide a small tip? ;)
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
43,021
970
No, that's not what he said. he said you need to know how many bits can be read in one revolution. I presume that by "rounds per minute" you mean "revolutions per minute". Multiply that by "bytes read per revolution".
 
  • #5
Ramses The Pharaoh
17
0
Hehe... nice point of view! :rofl:
However, this, being an exam problem, is assumed to be a little bit more complicated than simple arithmetics. :rolleyes:
I think it is enough to know the radius, the angular velocity (or frequency) and the time to read one bit (or distance b/n bits)... Once having these variables, how should I combine the megabits and the revolutions?! :confused: This is my problem
Thanks for your answers :shy:
 

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