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Hi, Anthony. I hope you are having a good day. I would just like to thank you so much for the help that you have given me in answering and providing crucial information for my experiment. I cant thank you enought for what you have done. Once again, and honestly, thank you so much! - Fineas When I did the initial calculations for B^2/z=mu_0*p*G/x I found that the answer of mu_0*p*G/x was negative, but any answer of B^2/z will be positive. How do I solve this problem, the formula doesnt seem to work out?
Question Date: 2008-08-29
Answer 1:

I'm glad I've been helpful!! Your answer for mu_0*p*g/x shouldn't be negative. I think I may have not defined g correctly for you before, so let's take a look at what the values should be:

mu_0 = 1.2566*10-6 T*m/A
p = 9780 kg/m3 (This is only true for Bismuth)
g = - 9.81 kg*m/s2 (For the equation I found, g is negative here because gravity acts downwards. Normally g is considered positive, and the negative sign comes in elsewhere, but the important thing is that it's negative here. I think this is where I made the mistake before.)x = - 1.66 * 10-4

I'm guessing you correctly used x as negative in your calculation, but missed out on g being negative since I defined it wrong. Sorry about that! It was good to notice that, though - it's always a good idea to take a look at your answer and think about whether it makes sense or not.

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