Recent content by RightFresh

Thank you!

I see - I've got it now! Think the "charge thing" I used was just a coincience that it worked

Oh I think I see. There's a pi/2 phase difference between them? Not sure how to account for it though? Also - was my original argument about the charge being the same valid? I wasn't completely convinced that it was :s

Hi again - partially stuck with a question and I'm not sure where to go. Hoping someone would be able to give me a hint :) A 75 W non-inductive light bulb is designed to run from an ac supply of 120 V rms to 50 Hz. If the only supply available is 240 V rms show that the bulb can be run at the...

It just says deviations & that's the answer given

It just says deviations & that's the answer given

Hi all, I have a question from a tutorial sheet that I'm stuck with. The question is Estimate the pressure at which a gas of argon atoms, at a temperature of 300 K, will begin to show deviations from the ideal gas behaviour due to the finite size of the atoms. Answer: Of order 10^9 Pa. So I...

Oh! I see. Thanks a lot for your help!

I did initially think that, but when you do L'(G/f), won't L' also need to act on f ?

So I've tried integrating these over an arbitrary range to remove the delta function, is there anything I can do with the integral of LG' or L'G ?? Thanks

I know that, but I can't seem to remove the dependence on either an L or L' operator. Do you have a hint on how to proceed?

I get L'G=f(x)LG=f(x) delta(x-x') I also have LG'=delta(x-x')/f(x) Does any of that seem right?

Hi, I'm stuck with a question from one of my examples sheets from uni. The question is as follows: If G(x,x') is a greens function for the linear operator L, then what is the corresponding greens function for the linear operator L'=f(x)L, where f(x) =/=0? So I've started by writing...

Yay! Thanks :) Interestingly, this gives me 18.3 not 18.4 rad/s but oh well

2 metres?