Recent content by Ivegottheskill

Thanks for your reply. So in this case the answer I obtained is correct? dS_total is > 0, but the entropy of the 'external' system (the "universe"?) balances the negative entropy of the internal system (the reaction and its components in the engine) ^Is this line of thinking correct^ If it...

Homework Statement Consider fuel cell using methane as fuel. Reaction is CH^4 + 2O_2 -> 2H2O+CO_2 Assume room temperature and atmospheric temperature Determine values of delta H (Helmholtz) and delta G (Gibbs) for this reaction for one mole of methane. Question instructed the use of...

Thanks I'll give that a shot. Sorry for the confusion, omega was a constant (angular frequency). I'm worried about how much high school stuff I've already forgotten :eek: I wasn't sure how to properly intergrate in that case. I tried looking it up, but could only find the simple cases...

An L-C circuit will undergo resonance, with the current varying sinusoidally, where: I(t) = I*cos(omega*t) I keep getting stuck with an answer of I*t*sin(omega*t) Can't find anything on the standard table of integrals that would indicate this is incorrect :confused:

No, still confused out of my brain. Was doing it on Mastering Physics.com, but exceeded attempts and failed the question. I tried a billion random different formulas. Worst thing is having no idea if they were even valid to use in an equation The answer was apparently 0.134 m, but I still...

Hmm, still having trouble, 1/2*m*v^2 + E*q*y = 0 + E*q*(unknown y value) The formula for E that I'm using doesn't make sense to me but appears right in my notes and textbook: E = lambda (charge per unit length)/2*pi*r*epsilon(permittivity of free space) I wouldn't think E relies on r...

The question I've been attempting: From my notes and working etc. I've got: E = lambda/2*pi*epsilon*r (where lambda = charge per unit length and epsilon = permittivity of free space) F = E * q (where q = the charge of the proton, -1.60*10^-19, as apparently defined by the question)...

I don't think "Time" as a real, concrete and reliably measurable quantity exists. The theory I've read that seemed to make a lot of sense to me was that time is a "shadow" of motion (i.e. changes) It could be suggested that evidence of this is that measure or perception of time changes with...

No. PHYS 1001 actually :eek: I just found this forum, looks like a useful resource all round. Thanks for clearing that up. My main problem I think is remembering all the letters and where they come from. BTW, you have U = N*5/2*k*T = n*N_a*5/2*k*T The only thing that changes there is...

This Q has me stumped, I'm still flicking through some web pages and my textbook, but been unable to find a useful formula to work it out yet: :confused: