Recent content by Ignitia

When I was moving out I had to destroy old documents but didn't have a shredder. I tore them to pieces and soaked it in a basin. After a week, they were illegible. Although that was a special situation. I recommend a shredder.

I think I got it: P = [RT/(v-b)]-[a/v2] Integrate with respect to T: dP/dT = RT/[(v/n)-b] (d/dT) - [a/v2] (d/dT) [a/v2] (d/dT) goes to 0 so dP/dT = R/[(v/n)-b] And a Maxwell states: dP/dT = dS/dV so: dS/dV = R/[(v/n)-b] dS = R/[(v/n)-b] dV ΔS = ∫ R/[(v/n)-b] dV And then just integrate...

Part (a) ΔS = ∫ (dq/T) because: dq = PdV = (nRT/V)dV Then: ΔS = ∫ (1/T)*(nRT/V)dV ΔS = nR ∫(1/V) dV ΔS =nR[ln(V2/V1)] Part (b) This is where I'm stuck. I know [P + a/(v/n)2][v/n - b] = RT can be solved for P and simplified to P = [RT/(v-b)]-[a/v2] since n=1mol But I don't know how to proceed...

...I was just thinking about separating the solutions, trying an experiment, or testing it with a chemistry kit, not stick a patent on it.

Thanks for all the replies. @Nik_2213 You've given me the idea for the book. Maybe I can incorporate it for my D&D campaign... I forgot to mention I'm an undergrad Chem, so I could extract the oils for something (except the blend; that looks too time consuming).

The book claims it can cure autism (No joke). I think that speaks volumes. I've edited the oils in the first post.

Haha. I'd donate it, but I fear the next owner will actually use it to heal their ailments. I don't want that on my conscience. Still need ideas for the oils.

My friend gave me a box of essential oils. It seems pretty wasteful to throw them out (and it's a gift), but I have no idea what to do with them. Scented soaps or perfumes would be a fun project, but I don't have the other ingredients to do that. So, I'm taking suggestions. (And what do I do...

Okay, in part (a) I had calculated the Electric Field both inside and outside the magnetic field. (for reference, inside was was dB/dt * r/2 < answer checks out) If I'm reading this right, I have to take that equation, calculate the field at t = 0 and t = 30, find the difference, and multiply...

Homework Statement Over a region of radius R, there is a spatially uniform magnetic field B →. (See below.) At t =0, B=1.0T, after which it decreases at a constant rate to zero in 30 s. (b) Assume that R=10.0cm. How much work is done by the electric field on a proton that is carried once clock...

Okay, I see what my confusion is now. I was thinking the area was shaped like a washer, and only integrated from r1 to r2, not from 0 to r2. I got it now!

Homework Statement A portion of a long, cylindrical coaxial cable is shown in the accompanying figure. A current I flows down the center conductor, and this current is returned in the outer conductor. Determine the magnetic field in the regions (a) R ≤ r1, (b) r2 ≥ R ≥ r1, (c) r3 ≥ R ≥ r2, and...

Homework Statement The accompanying figure shows a current loop consisting of two concentric circular arcs and two perpendicular radial lines. Determine the magnetic field at point P. Homework Equations B = μ/(4π) ∫ (I*dl x r)/r2 Btot = Ba - Bb The Attempt at a Solution For part a: Ba =...

So I just take the absolute value? That makes sense, thanks.

Homework Statement Viewers of Star Trek have heard of an antimatter drive on the Starship Enterprise. One possibility for such a futuristic energy source is to store antimatter charged particles in a vacuum chamber, circulating in a magnetic field, and then extract them as needed. Antimatter...