Recent content by CinderBlockFist

well the definition in my book gives: Q quadric surface is the graph of a second-degree equation in three variables x, y, and z. So i guess cause its the graph of a quadratic equation in 3-D.

Oh wow I feel stupid, I was searching my whole book. Thanks again.

In my differential equations book there is this step, that i don't know how it goes from one side to the next. (t^2)y' + 2ty = ((t^2)y)' cause, on the left side I factor out a t, and i get t(ty'+2y) ...so do i have to learn partial derivatives in order to get from the left side to the...

SWEEET! THANK YOU GUYS. I got my laws of exponents mixed up.

ok, so far i tried this. I know e^(lnx) = x so, i broke the e^(2ln|t|) into to parts: e^2 times e^(ln|t|) which equals t (from the top identity) so I am left with e^2 times t. which is te^2 but the book says it equals t^2..so what happened to the e? (exponential function)

ok guys, i don't see how e^2ln|t| = t^2 can someone explain it to me please? Seems so easy but i don't see it.

OK, first i had particle1 had -1 charge, and neutral particle 3 had +0.5, and -0.5 charge (since it is the same size as particle 1). When they touch, I added up the charges and divided by two, since the charges would distribute equally, so both end up w/ -0.75 and +0.25 charge. Next...

OH crap, thanks mason, leme try it out.

Identical isolated conducting spheres 1 and 2 have equal amounts of charge and are separated by a distance large compared with their diameters (Fig. 22-20a). The electrostatic force acting on sphere 2 due to sphere 1 is F. Suppose now that a third identical sphere 3, having an insulating handle...

Cool, I just plugged in F=ma using the acc. of particle 2. Thanks MS! for the quick response!

am I supposed to add the accelerations of particles 1 and 2, when i use F_net = ma?

Thanks math student. Ok this is what i got so far, I'm not sure if I am approaching it correctly. I used F=ma for the first particle. F = (6.3 x 10 ^-7)(7.0 m/s^2) I got F = 4.41 x 10^-6 N So, using Coulomb's Law I set this F F = k (q^2/(3.0 x 10 ^ -3)^2) since...

Hi all, I am having trouble on where to start w/ this problem: Two equally charged particles, held 3.0 10-3 m apart, are released from rest. The initial acceleration of the first particle is observed to be 7.0 m/s2 and that of the second to be 10.0 m/s2. The mass of the first particle is...

Is 2nd law of dynamics, you mean Newtons 2nd law? Because I haven't taken dynamics class yet.

Our Sun, with mass 2.0 1030 kg, revolves about the center of the Milky Way galaxy, which is 2.2 1020 m away, once every 2.5 108 years. Assuming that each of the stars in the galaxy has a mass equal to that of our Sun, that the stars are distributed uniformly in a sphere about the galactic...