Recent content by bocobuff

Homework Statement I'm trying to find the arc length of a curve over an interval and I've arrived at \int (y4 +2y2 +1)1/2 dy and now I'm pretty sure i should use a u substitution in order to integrate. I tried using u=y2 so du=2y dy so dy=du/2y Then you have \int (u2+2u+1)1/2 and...

Homework Statement it's been a long summer and i forgot everything. i need help integrating 1-cos(t)dt evaluate g(x) = [\pi,x]integral (1-cos(t))dt i know by pt2 of fund. thm of calc that g' (x) = 1-cos(x) but i can't remember how to evaluate the integral and then differentiate to...

nvm, it should just be the same as the electron due to conservation of energy so =3.63 keV

Homework Statement an electron starting from rest acquires 3.53keV of kinetic energy in moving from A to B. how much kinetic energy would a proton acquire moving from B to A. Homework Equations 1/2mv2 me=9.11e-31 kg mp=1.67e-29 kg 1eV=1.6e-19 J The Attempt at a Solution...

it should be (L^2 + d^2) to the 3/2 power. and it is integrated from 0 to 1/2. and lamba is the linear charge density, L is length of rod, d is distance normal to rod

Homework Statement A rod of length 0.1m has a uniform linear charge density of 3C/m. Determine the Electric field at a point d=P located at a perpendicular distance 1m along a line of symmetry of the rod. The Attempt at a Solution I know i have to use super position and integrate but I...

That's not really what i was asking... So say I already took N=7 measurements and have the best estimated uncertainty for the mean time, which is 0.03. Now I want to reduce that number to 0.012 by taking some new number of measurements. Wouldn't I just use the ratio 0.03/0.012 = 2.5 and then...

Homework Statement I want to lower the uncertainty of an experiment to 0.012 s from 0.03 s by performing x number of more measurements. I already have the mean, std dev, variance. I know I need the factor of 0.012/0.03 somehow but I don't know where to apply it. Any suggestions?

alright i got it all figured out. s the net charge only the magnitudes or would you subtract the negative charge?

It won't contribute anything. So I tried KQ0/(distance to A)2 - KQ1/(distance to A)2 and it wasn't right. What's up?

Homework Statement A point charge is at the center of a conducting hollow sphere, with radius 0.011m, that is within another conducting hollow sphere of radius 0.041m. The point charge is Q0=+4.30e-6 C, the inner sphere has a net charge of Q1=-1.70e-6 C, and the outer sphere has a net charge...

and the greater the distance, the less the strength?

Homework Statement A positive charge is located at the center of a cube. Are the intersections of the field lines with a side of the box uniformly distributed across that side? Explain The Attempt at a Solution I'm trying to picture this in my head and I'm getting stuck. I know the field...

1. Homework Statement For uncorrelated uncertainties LaTeX Code: \\delta x and LaTeX Code: \\delta y give the values and uncertainties for W in standard format. A.) W=x+y with x=4.2(0.2) and y=0.7(0.1) 2. Homework Equations [b]3. The Attempt at a Solution well i think i am...

So after a bunch of substitutions and algebra solving for Vcore, I got Vcore=(\rhoavg*V\rhoplanet - \rhomantle*Vplanet) / (\rhocore - \rhomantle) and got 1.206*1026g/cm3. Solving for the radius I got r=\sqrt[3]{Vcore/(4pi/3)} and got 3.0665*108cm which is 3065km, roughly 75% of the planet's...