Recent content by Bogus_Roads

So then you're saying it wouldn't be the same in the 1mm wire as in the 2 mm wire?

Homework Statement Asking for drift speed, current in the second 2 mm diameter wire. Homework Equations electron flow=qvA, I=V/R, R depends on A---why doesn't current then depend on A? The Attempt at a Solution I can only solve it if the currents in both disks are the same...

Maybe they used millimeters instead of centimeters for the distance between the plates.

Thanks gneill, So 1.4 x 10^5 V would make 1.4 x 10^7 V/m correct? Does it make sense to add values of sigma to find the electric field, as was done in the Cramster problem I found online?

Homework Statement The book also asks for E versus x. Homework Equations dV/dx=-E E=sigma/epsilon0 The Attempt at a Solution This question seemed fairly straightforward: I assumed it could be treated like two +-50 nC capacitors, each with d=1 cm. According to my...

Great, thanks for the help!

Homework Statement Multiply the given equation by the given integrating factor and solve the exact equation. Homework Equations ydx+(2x-yey)dy=0, \mu(x,y)=y. The Attempt at a Solution M=y2, N=2xy-y2ey Integrating N=\Psiy WRT x I get xy2-((1/3)y3ey + y2ey)+h(x)=\Psi(x,y) Differentiating...

I'm having trouble putting the correct formula in on my smartphone, so I just mean the standard formula for electricnfield between two charged rods. Can someone please answer?

(Epsilon shouldn't be an exponent)

Homework Statement Two questions: One problem asked me to calculate the Electrical Field at points 1 (1cm from the + rod),2 (2 cm from the positive rod), and 3 (3 cm from the positive rod) between a +10 nC rod and a -10 nC rod (in the middle in the vertical direction). I found that...

Gotcha. Thanks.

Homework Statement Consider a population p of field mice that grows at a rate proportional to the current population, so that dp/dt=rp. Find the rate constant r if the population doubles in 30 days. Find r if the population doubles in N days. Homework Equations ...The Attempt at a Solution...

Fluid is entering a patient at a rate r, given in cm^3/hr, and a drug is present at some amount of mg/cm^3, m. The drug is absorbed or leaves at a rate given in h^(-1), c, proportional to the amount of the drug. I want to write a differential eq describing amount, a, in terms of t. I...

How do you know greater length acted over=greater time?

Homework Statement Two different materials are being considered for a safety pad below a swing. Material 1 has a Young's Modulus twice that of Material 2. Which should be chosen? A. Material 2, because the length over which the impact force acts is larger, resulting in a lower average...