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Physics: Post your doubts here!

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formulas u will have to use..
attenuation=10 x log(P in/P out)
signal to noise ratio=10 x log (P out/P noise)
attenuation per uni length=total att/total lenth

do as follow
1 find power out......using secong formula.. 30=10 x log(p out/6.5x10-6) so p out=6.5x10-3W
2.find attenuation using formula 1 att=1o x log(26x10-3/6.5x10-3) so attenuation=6.02dB
3 finally find length using formula 3 length= 6.02/0.2=30 km
for the 1st step the formula ok is understood then u make pout the subject then wht has to be done i dont get then how to get it plz elaborately explain the first step
sma786 can u xplain it?
 

Nibz

XPRS Moderator
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Excuse Me. In your limits please.
There was absolutely no reason for you to have argued with someone publicly in a formal thread over such a petty thing.

My best guess is he is your tweedledum:love:, so I am not into teen drama.
You should not have said this. And many other things.

manhus shakal ki bai sharam aurat! :LOL:
Honestly, if there is anyone who is not in his/her limits, it's you. Using a language other than English in a proper thread, and that too an insulting one, is not allowed at all. So, you better watch what you are doing before telling others what to do and what not to.

And next time when you people find a post offensive, simply report it, and we will handle the rest. Do not act as backseat moderators.
 
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There was absolutely no reason for you to have argued with someone publicly over such a petty thing.


You should not have said this. And many other things.


Honestly, if there is anyone who is not in his/her limits, it's you. Using a language other than English in a proper thread, and that too an insulting one, is not allowed at all.

And next time when you people find a post offensive, simply report it, and we will handle the rest. Do not act as backseat moderators.
I understand and I apologize to you for arguing in a formal thread :)
 
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