Recent content by TheExibo

So enthalpy is the heat content of a system at constant pressure. Enthalpy change is equal to the heat absorbed or evolved by the system at constant pressure. If my understanding is correct, a system whose temperature goes up will return back to that starting temperature if pressure is kept...

Nevermind. I have found that the equation V=kp/r^2 works, although I don't know how this equation was derived.

So I have P/(2q)=d/2 so far. I have also made the equations V=qk/(r-d/2) and V=qk/(r+d/2) and r is the distance from the origin to the point at which potential is measured. What is next? I don't understand how to substitute them since d/2, V, and q are unknown.

How do I determine what d/2 is?

Has anyone figured out how to do this question? I have it too but I can't find the procedure anywhere online for it.

Right but how can a transition state decide to go backwards? Or is a reverse reaction a completely different mechanism with a different transition state?

It is generally said that reactants react so that they can achieve a lower energy state. Then why does a reversible reaction occur in the first place? If catalysts lower activation energy both ways in a reversible reactions by making the transition state less thermodynamically unfavourable...

Never mind, the answer with the radians was correct. How come degrees wouldn't work though?

I found that y=Asin(kx) should be the correct one to use, and with radians, I get 10.62m. I'm still not sure

I used radians, and got a very long length for the wire. I only have one try left for answering my question, so I'm afraid to risk it. My reasoning was to find the wave number using y=Asin(kx) (this equation was suggested in another question, but I don't know if it is right since I've seen...

Homework Statement A string vibrates at its third-harmonic frequency. The displacement at a point 59.0cm from one end is the first time the displacement is half the maximum amplitude. How long is the string? Homework Equations wavelength=(2(rope length))/nodes y=Asin(kx) k=2pi/wavelength...

If RNA polymerase moves from the 3' to 5' end of the template strand to synthesize an mRNA strand from the 5' to 3' end (http://www.ncbi.nlm.nih.gov/books/NBK22085/), how come promoters are located on the 5' end (said in my Biology class)? It was also mentioned that while RNA polymerase moves...

Homework Statement Evaluate the definite (from -0.3 to 0.3) integral ∫tanxdx Homework Equations (dy/dx)tanx=(secx)^2 The Attempt at a Solution Using the anti-derivative, I got to (sec(0.3))^2-(sec(-0.3))^2, which gives approximately 2. However, if the derivative is sketched out, and the...

Homework Statement http://m.imgur.com/tAbHL6S[/B]Homework Equations Velocity=displacement/time The Attempt at a Solution I thought B at first because they start at the same position, so their relative velocities would determine their relative positions, but I guess not since the answer is...

Thanks for all the replies! Wouldn't it be possible for us to see phases of Venus in a geocentric Solar System? Suppose that the Sun is on one side of a stationary Earth, and Venus is on the other. You can see a "full Venus". Now imagine both the Sun and Venus on the same side of the Earth...