Recent content by xSpartanCx

Derp. should've been using 1- exp(-t/(L/R))

Homework Statement An inductor is connected to the terminals of a battery that has an emf of 12.0Vand negligible internal resistance. The current is 4.86mA at 0.940ms after the connection is completed. After a long time the current is 6.45mA. Homework Equations V = IR V(t) = V0 (exp(-t/τ))...

Yes, that's part of the emf value.

A coil 3.65 cm radius, containing 560 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20×10^−2 T/s)t+( 3.05×10^−5 T/s4)t^4. The coil is connected to a 600-Ω resistor, and its plane is perpendicular to the magnetic field. You can ignore the resistance of the...

EDIT: I was using the surface area equation and not the volume one.. whoops. I guess I just needed to organize my work more and I was able to figure it out.

I realized that the L's cancel. So if lambda * L is q, using .5*λL / (2π(.0072-.0048)) = .0013 but that's not the correct answer. What am I doing wrong?

Homework Statement An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 48 mm and 72 mm. The electric potential of the inner conductor with respect to the outer conductor is -536 V (k = 1/4πε0 = 8.99 × 109 N · m2/C2) The average energy...

Unfortunately those are the dimensions of the area; we kept the x dimension stable at .252m, whereas the y would decrease -- {.2, .19, .183, .173, .16)m

On page 53 of this paper (http://users.df.uba.ar/sgil/physics_paper_doc/papers_phys/e&m/dielectr_const_2k4.pdf), they show a graph of inverse thickness vs the capacitance. In that paper, they show that based on the amount of pressure, the y intercept varies, and none of their lines ever go...

Ah, I see. So I would use m1v1 - m2v2 = -vf(m1+m2) to get the velocity where they are not moving relative to each other, then use their kinetic energies to find what the electric potential is and then the distance between them. Thanks!

Shouldn't they get closer and closer, until they both have turned all of their kinetic energy into electric potential, then the electric energy converts back into velocity in the opposite direction? Like two magnets in a tube moving towards each other? I don't know much about this, my physics...

So then why do I get .89 for one calculation and 3.7 for the other? The slope I get for C vs A is 8x10^-8

How would I incorporate the conservation of momentum into this? There don't seem to be any collisions.

Homework Statement An alpha particle is a nucleus of helium. It has twice the charge and four times the mass of the proton. When they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed of 3.6×10−3c, where c is the...

I expect the two k's to be the same since it's still got paper in between. the first plot has an area of .252m by .2m, the second plot has 4 sheets. If I do A vs C, then I get k to be 3.7. Why are they so different? EDIT: Oh, I see! is the 3.7 the dielectric constant for 4 sheets, and...