Recent content by accountdracula

That's a really clever idea, thank you! I'll definitely try that tomorrow.

Homework Statement My (practise) coursework is to test the equation 'V = Vo e-t/RC' and choose values of R and C so that the voltage across the capacitor falls to half in 15 seconds. I decided it would be too difficult and inaccurate to record the voltage across the capacitor every 5 seconds...

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I mean the plane of the area of the metal ring is perpendicular to the plane of the magnetic field lines. The magnetic field is uniform. I don't have a clue what self parallel within the region of interest means.

Homework Statement I'm answering a question which describes a situation in which a metal ring is dropped through a magnetic field such that, when it falls, its area is perpendicular to the magnetic field. I need to find its terminal velocity given: Mass : 2.66 x 10-4 kg Magnetic flux density ...

I'm studying electromagnetic induction and I'm trying to understand a couple of things: Why is the flux greatest when the angle between the conductor and magnetic field is 90 degrees? How does the induced e.m.f oppose the change which induces it? My thoughts: The flux is greatest when the angle...

Ah, my units for T are in terms of day. I need to ask him to explain what he meant better I think.

It makes even less sense to me. My teacher hasn't even talked about Kepler yet but we've started doing Gravity so he'll probably bring the two topics together and explain. I'm confused about you saying there's no y = 0 line? I think perhaps you think I meant a graph like this one...

Can I just ask another thing, my teacher said the x intercept should give the radius of the sun but my value was out. Because I was just reading where the line crossed the axis I don't think I got that bit wrong. My intercept was 24.46 So I did e^24.46 4.196 x 10 ^ 10 m / 41.96 x 10^6 km Any...

Oh, I understand. We haven't actually been through that equation in my lesson yet so I wasn't really sure about that. In my textbook it just said 'Keplar's third law".

Ohh, I probably read my graph wrong because I used compressed scales. I'm a total fool sometimes, sorry. Those numbers should give 3/2 which is right because T^2 = a^3 so T = a^3/2 yes?

gneill, I don't know what you mean by relevant equation. phyzguy, my values are follows: All radiuses stated are x10^10 R: Mercury - 5.785 V - 10.81 E - 14.95 M - 22.78 J - 77.76 S - 142.58 T: (in Earth days) M - 87.97 V - 224.7 E - 365.3 M - 687.1 J - 4333 S - 10 760 lnR (In the respective...

Homework Statement Using the equation T = kr^p I drew a loglog graph of orbital time period against orbit radius for the planets Mars to saturn. lnT = plnr + lnk My value for gradient was 5.25/0.48 = 10.94 Meaning p = 10.94 How do I compare this to the actual value? What is it?Homework...

Yeah, with that value I calculated: (8.25 * 235) - 1703.75 = 235 MeV 235 MeV = 3.77 x 10 ^ 11 ! Hurrah!

I did 7.25 MeV per nucleon * 235 nucleons. I've just realized that I used the wrong conversion factor. This gives me 1.70375 * 10 ^ 9 eV / 1703. 75 MeV Nasu, I needed to convert to eV because the question asked for it that way.