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07-27-2011, 08:32 PM
 22,662 posts, read 24,610,454 times Reputation: 20339

Quote:
 Originally Posted by Tek_Freek Or Charles will do your homework. That's really nice of him. You aren't learning a damn thing in the process so even though Charles thinks he's doing you a favor and you appreciate the opportunity to be lazy, you'll be embarrassed the first time you need to actually do your own research at a job and don't have a clue how to go about it.

Uh, I am not a genius, but I already know the formulas in question. I just thought a simple little mind teaser might be appreciated...............SORRY.

07-27-2011, 08:34 PM
 Location: The Ranch in Olam Haba 23,707 posts, read 30,758,648 times Reputation: 9985
I'll supply --> π

07-27-2011, 08:36 PM
 22,662 posts, read 24,610,454 times Reputation: 20339
Quote:
 Originally Posted by Offsetdude If you use 6.28 to equal 2pi your calculations can be way off, the higher the frequency the higher your error can be. To rearrange use a KNOWN equation like 24=2*3*4 as a primer
Yes, this is a very great idea, using a known quantity to define variables.

And the formula, AFAIK, is generally accepted in all electronics as being adequate. I am sure there are situation where it is not accurate enough, that would be few and far between.

08-02-2011, 12:21 PM
 13,053 posts, read 12,955,596 times Reputation: 2618
Quote:
 Originally Posted by tickyul Uh, I am not a genius, but I already know the formulas in question. I just thought a simple little mind teaser might be appreciated...............SORRY.
Don't take it personally tickyul, I am pretty sure Tek wasn't jumping your case for the fun, it is just that we do happen to get a ton of posts from here time to time that are essentially a cut and paste of their homework or job request (see those all the time on the network engineering boards) to which the person has no intention in actually understanding the problem, but just wanted a quick solution without putting any effort into it.

I like these type of mind teasers, but as Tek's comment points out, there are a lot who end up abusing the game.

08-02-2011, 12:56 PM
 28,803 posts, read 47,711,118 times Reputation: 37905
Quote:
 Originally Posted by tickyul Inductive reactance(XL) = 6.28*(f)frequency*(L)inductance Transpose and the show formulas for Frequency and Inductance, show your work.
If this isn't directly out of a text book I'll eat 15 Snickers bars.
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