Argh... I figured out what I did "wrong" in the end.
I put that k = 8.99 * 10^9, so instead of writing down k, I wrote down the numerical value. And the system kept telling me that it was wrong. So the answer was:
F_q_3x = 2[(k)(q)(-Q)/(a^2 + x^2) * x/(sqrt(x^2 + a^2))]
That's...
I don't understand.
Since I'm looking for the x-component of the force, I'd need the force directed along the x-axis, right? If the "height" of the triangle of one force is a, and the "base" is x, then the hypotenuse of the triangle would be sqrt(a^2 + x^2), right?
Why would I need the...
Homework Statement
Two positive point charges q are placed on the y-axis at a and -a. A negative point charge -Q is located at some point x on the +x-axis.
Find the x-component of the net force that the two positive charges exert on -Q.
Express your answer in terms of the variables q...
1. Homework Statement [/b]
For the surface with parametric equations r(s,t) = <st, s+t, s-t>, find the equation of the tangent plane at (2,3,1).
Find the surface area under the restriction s^2 + t^2 <= 1.
2. Homework Equations [/b]
3. The Attempt at a Solution [/b]
I already...
Homework Statement
Can someone check my work?
[...] Receiving DATA in binary. The string length of each word is unknown. You are told that each word, demarcated by SYNC signals, is a two's complement number.
Your task is to develop a synchronous sequential machine which examines the...