Thanks for clearing it up a bit, xienwwolf. I don't know how to answer your questions though.
I'm still confused on how you can tell which charge is positive and which is negative based on their directions of motion and the field direction. Can someone explain the underlying concept/reason...
Homework Statement
Charges 1 and 3 in the figure below have the same mass and the same speed. Which has the greater magnitude of charge? What are the signs of the charges?
http://www.webassign.net/colfunphys1/21-p-001.gif
Homework Equations
F = |q|v*B*sin(θ)
The Attempt at a...
Ok. If P is the compressive force, and A is the cross-sectional area that the force is applied to, I would think that A= ∏*r^2 for the surface of the cylinder. Then, multiplying A by the maximum stress 2e8 N*m^2 would yield P?
Compute the maximum longitudinal force that may be supported by a bone before breaking, given that the compressive stress at which bone breaks is 2.00e8 N/m^2. Treat the bone as a solid cylinder of radius 1.55 cm. The attempt at a solution
I tried using the equation Max Torque = pi/4 * (r^3) *...