Recent content by PatrickGeddes

Homework Statement Consider and electron being ejected from the surface of a heated filament at nearly zero speed. Through what potential difference must it be accelerated to achieve a speed of 8.4x10^6 m/s? Homework Equations I have found that the equation I should be using is 1/2mv^2=eΔV...

Don't think this is right, I feel like the factor that the 8.55cm from the wall should make a difference. Is that right?

Homework Statement A nonconducting wall carries charge with a uniform density of 8.55 µC/cm2. (a) What is the electric field 8.55 cm in front of the wall if 8.55 cm is small compared with the dimensions of the wall? Homework Equations σ= Q/A E=σ/2Eo The Attempt at a Solution...

Homework Statement Three point charges lie along a straight line as shown in the figure below, where q1 = 6.36 µC, q2 = 1.56 µC, and q3 = -1.84 µC. The separation distances are d1 = 3.00 cm and d2 = 2.00 cm. Calculate the magnitude and direction of the net electric force on each of the...

Homework Statement A charged cork ball of mass m is suspended on a light string in the presence of a uniform electric field, as shown in the figure below. When E = (A + B) N/C, where A and B are positive numbers, the ball is in equilibrium at the angle θ. (a) Find the charge on the ball...

Is this enough work so far?

Ok sorry, first time using the site. I did F of q1 on q2 is ((8.99x10^9) x .00000636 C x .00000156 C)/.0009 m=99.10576 N and F of q3 on q2 is ((8.99x10^9) x -.00000184 C x .00000156 C)/.0016 m=-286.72 N. Then for the Force on the middle charge I just added them together to get -187.8 N.

Also, just looked at the second two questions, don't know where to start... (b) Determine the period of that motion. (Use the following as necessary: π, q, Q, m for the mass of charge Q, d, and ke.) T = (c) How fast will the charge −Q be moving when it is at the midpoint between the two...

Two identical particles, each having charge +q, are fixed in space and separated by a distance d. A third particle with charge −Q is free to move and lies initially at rest on the perpendicular bisector of the two fixed charges a distance x from the midpoint between those charges (see figure...

I did this problem just the way I took notes on it in class and keep coming up with the wrong answer. Please help I've spent nearly 2 hours on this one simple problem. Thanks. Problem: Three point charges lie along a straight line as shown in the figure below, where q1 = 6.36 µC, q2 = 1.56 µC...