Recent content by ZedCar

Which MSc course below do you think would be better to have upon graduation, in terms of being able to obtain employment in some area of science or research, or perhaps engineering? Both are at the same university. MSc Materials Science. This is an online course (no lectures), though a...

Okay, thanks for pointing that out.

Is it okay to introduce a negative sign to the 6.272?

I'd got 3.4 by taking the 13.8eV I originally and dividing by 2^2. Though I have head other students mention they had used 0.7 for this value. So you're 0.7-0.75 could well be correct. When I re-do the calculation with 0.7eV I get a result of 6.272, which is a lot better, though I'm not sure...

So you mean: log(N+/N) = log(u+/u) + (5/2)logT - log(Pe) - χionӨ - 0.18 log(N+/N) = log(2/1) + (5/2)log6000 - 2.7 - (3.4)x(5040/6000) - 0.18 log(N+/N) = 0.30 + 9.44 -2.7 - 2.86 - 0.18 log(N+/N) = 4.00 (N+/N) = 10000 (N+/N) = 1x10^4 Though I'm still not getting 5x10^(-7).

How do I convert log(2/1) to base e, to the base 10?

I thought it was all to the base 10. What do I have that is to the base e?

I discovered one mistake, (5/2)log6000 should of course equal 9.44 (not 21.748)! log(N+/N) = log(u+/u) + (5/2)logT - log(Pe) - χionӨ - 0.18 log(N+/N) = log(2/1) + (5/2)log6000 - 2.7 - (3.4)x(5040/6000) - 0.18 log(N+/N) = 0.693 + 9.44 -2.7 - 2.86 - 0.18 log(N+/N) = 4.39 (N+/N) = 10^4.39 (N+/N) =...

log(N+/N) = log(u+/u) + (5/2)logT - log(Pe) - χionӨ - 0.18 log(N+/N) = log(2/1) + (5/2)log6000 - 2.7 - (3.4)x(5040/6000) - 0.18 log(N+/N) = 0.693 + 21.748 -2.7 - 2.86 - 0.18 log(N+/N) = 16.70 (N+/N) = 10^16.70 (N+/N) = 5.01x10^16 Here I have changed I have changed χion to 3.4eV. This gives a...

If you mean the value for χion should instead be 3.4eV, then this would have the effect of making my solution even larger than it is. Whereas apparently the correct solution is a lot smaller.

Homework Statement The Saha equation for the hydrogen atom can be written as log(N+/N) = log(u+/u) + (5/2)logT - log(Pe) - χionӨ - 0.18 where Ө=5040/T χion is measured in electron volts (eV). Calculate the number of negative hydrogen ions (H-) in the solar photosphere relative to neutral...

Homework Statement I am attempting to solve a question which asks the carriers in Ag. Homework EquationsThe Attempt at a Solution Is the use of the word 'Carriers' simply another way of saying excited conduction electrons? Thank you.

Thanks guys!

In the general-symmetry-space group table over to the right on the page below: https://en.wikipedia.org/wiki/Mimetite It states: Space group: P63/m What does the letter P indicate and also the subscript 3? Thanks

n0 should be 4. I used n-1 in the formula to represent n' as in the Rydberg formula. n' being 1 less than n.