Recent content by foxandthehen

On second thoughs, good point! Perhpas I am taking the term lay-person a little to seriously when I have used examples to explain my final point! Thank you.

Hi! I once saw a list called something like 101 ways to express the second law of thermodynamics... so, I can't really state the law of thermodynamics because its accepted wording ranges from the law of increasing entropt, to the K-P statement, to C's statement, etc... or have i missed...

To start off... Thank you so much! and I am 'sadly' dislexic and this is a first first draft (have only spend about 20mins on it), so I will be sitting down with someone to go through the grammar errors which MS word hasn't picked up, so thank you again for putting up with it! I did think about...

I would apreciate some proof-readers giving their comments on my answer to an assignment for Undergrad Physics 2nd Year. Homework Statement Question: Give an explanation of the 2nd law to an intelegent non-scientific lay-person, drawing ideas from the K-P Statement, C's Statement and the...

What do you guys think the best answer tyo these questions are? Descibe in detail an x-ray machine for use in a n undegraduate research lab: (6 marks) Explain how both characteristic and bremsstrahlung x-rays are produced? (4 marks) State two differences between the x-ray machine you...

Hi! Thanks for the answer! I managed to do and hand it in yesterday and it was really quite simple in the end, think I just had a mental block about it! lol. oh and I used Angular acceleration = (1/r)(Vbelt/dt) :D

ahhh, I see! I was on the whole, the symbol with the 'o' after it is normally lower, where as for this one its higher as it decreases over distance! Must have been a long day as I totally missed that one! Plus, as its 'per cm' I was going the wrong way on converting it to m! So we have; X(1/2)...

Hi, thanks for your answers! The mU I have stated is the linear absorption coefficient and therefore rated in the units of "per cm" and your right that that's energy, not intensity, but as you would need to do the same things to both the first (I) and the second value (Io) to convert them to...

http://img60.imageshack.us/img60/7782/question6jh6.png The axis of a disk with radius of 0.05m is fitted into a slot that forms an angle of 30degs with the vertical axis. The disk is at rest when it is placed in contact with a convayor belt moving at contsant speed. The coefficient of kenetic...

1. Determine the half value thickness, X(1/2) for lead where; I = 0.4 MeV u = 1.59cm^-1 2. using; I = Io e^-ux3. ln(I/Io) = ln(e) -ux ln(2) / -1.59x10^-2 = X(1/2) => X(1/2) = -1.7523m Is that right?

Has anyone got any ideas yet? I haven't shown my workings as they are all on paper and crazy wrong. Both a friend and I sat down for a few hours yesterday and tried this and another question and got nowhere and its due in for tomorrow! any ideas at all?

The axis of a disk with radius of 0.05m is fitted into a slot that forms an angle of 30degs with the vertical axis. The disk is at rest when it is placed in contact with a convayor belt moving at contsant speed. The coefficient of kenetic friction between the disk and the belt is 0.2 and there...