Recent content by joej

heh if I knew that I wouldn't be here :P erm, just plugged it all into the forumla I posted earlier, I don't know why it turned out that small. as for h, which is Planck's constant, being that small, I just used what was given to us some time ago as the accepted value for it. should it...

okay well h = 6.63 x 10 ^ -34 Js or 4.14 x 10 ^ -15 eVs m = 9.11 x 10 ^ -31 wavelength = 1 x 10 ^ -10 m I get 2.2 x 10^ -82 eV I stop here since this seems way off

1. a 31-cm-diameter coil consists of 20 turns of copper wire 2.6mm in diameter. A uniform megnetic field perpendicular to the plane of the coil, changes at a rate of 8.65 x 10 ^ -3 T/s What is the current and what is the rate at which thermal energy is produced? now I figured this would be...

determine the magnetic field between 2 long straight wires 2cm apart in terms of the current (I) in one, when the other carries 15A. Assume currents are in the same direction. okay so if they're in the same direction the field should be up now I'm guessing I should use (4pi x 10^ -7)/(2pi)...

ah okay I finally get it thnx to both of you, great help, really appreciate it ;)

Forgive my thickness but I can't figure out how to go from those two to proving that (r^2) is proportional to (1/2 mv^2) well yeah that's just the v at the bottom is canceled out by v^2 and the square is thus also gone, but where do I go from there

okay so what I get is... angle = 0.000000000592 so I use equation 3 and I get cos(angle) = 0.999999999999999999824768 R - R(0.999999999999999999824768) = 1690000000000 - 1690000000000(0.999999999999999999824768) = 0.00000029614208 so... 2.96 x 10 ^ -7 does that seem about...

KE = 1/2 mv^2 yeah I know that still don't see how I can go from r = (mv^2)/F to r^2 = 1/2 mv^2

yeah I'm pretty sure... just double check it now again... m = 3.8 g B = 5 x 10 ^ -5 T q = 8.1 x 10 ^ -9 C distance traveled = 1.0 km

this should probably go in the HS section since it is review of some material covered there but... I'm guessing the same peole brose the two forums so I might as well post it here since it came up in college. now the questions seems quite straight forward: for a particle of mass m and...

an object of 3.8g moves @ 180m/s perpendicular to a magnetic field of (5x10^-5)T the object possesses a net charge of (8.1x10^-9)C by what distance will it be deflected from its pathe due to the magnetic field after it has traveled 1.0 km so I'm guessing I'll have to find out the...

okay, so I get... ma = (1.64x10^-21)/(1.6x10^-19) = 0.01N/C would that be right?

What is the electric field strength at a point in space where a proton experiences an acceleration of 1 million "g"? I'm completely lost on this one I know it's bound to be something simple but I just can't figure out where to start with it, well other than that 1 million "g" should be...

If 30 MW of power at 45kV (rms) arrives at a town from a generator via 4-ohm transmission lines, calculate the fraction of power generated that is lost in the lines. okay I think I'm not completely understanding what I'm supposed to do in this question, or I'm missing something as from my...

okay tripple checked everything, I got nothing wrong so it seems that the answer key is bogus, thnx for the help