Thread: Cannot find L2 in equation

Hello all,I need help with a particulary sticky equation - L2 = L1 + 20*log10(d1^2/d2^2)where:L1=94 d1=1 d2=1500I'm given that the answer for this should be L2 =30.5 but i cannot seem to make it work!!!Please please help me - this is quite urgent! I would appreciate any comments!!Thanks very much

Originally Posted by Fitzy

Hello all,I need help with a particulary sticky equation - L2 = L1 + 20*log10(d1^2/d2^2)where:L1=94 d1=1 d2=1500I'm given that the answer for this should be L2 =30.5 but i cannot seem to make it work!!!Please please help me - this is quite urgent! I would appreciate any comments!!Thanks very much

Please try not to double post.

-L2 = L1 + 20*log[10(d1^2/d2^2)]

L1 = 94
d1 = 1
d2 = 1500
L2 = 30.5 (or so you say)

-L2 = 94 + 20*log[10(1/1500^2)] = -13.04365

Check to make sure the numbers are correct. Check also to make sure you are looking at the correct answer (in the back of the book, I assume).