# Search results

1. ### Electric field E= dV/dS

Homework Statement OK we had a lab and the lab was to draw some dots mapping a electric field. I connected the dots, but i have no idea which way the field points and how to calculate the electric field. I think we need to use E= dV/dS , but i have no idea what dS is. Do i just take the...
2. ### Equilibrium problem

Homework Statement http://img820.imageshack.us/img820/3505/23625990.jpg [Broken] Two uniform beams, each of mass M and length L, are connected by a hinge at the top and by a chain of negligible mass attached between their centers. The system will stand upright on a frictionless surface as...
3. ### Represent (1+x)/(1-x) as a power series.

Homework Statement Represent (1+x)/(1-x) as a power series. Homework Equations The Attempt at a Solution I started with 1/ (1-x) = sum (x)^n n= 0 - infinity (1 + x) sum x^n and this is where I am stuck. Homework Statement Homework Equations The Attempt at a Solution
4. ### Is this problem do able?

A proton with initial kinetic energy (5.2 MeV) collides with an alpha particle (initially at rest). The collision is perfectly elastic and the proton travels off at an angle of 133o relative to its initial direction. What is the velocity of the alpha particle after the collision? Assume the...
5. ### A radial acceleration problem.

Homework Statement [PLAIN]http://img508.imageshack.us/img508/6861/21296472.jpg [Broken] I tried to get a_rad and if i didn't make any mistake, then a_rad = 15.79 m/s. I need to find angle when the bean is at vertical equilibrium. Homework Equations a_rad= v^2/R =...
6. ### How do I find acceleration of two block.

Homework Statement http://yfrog.com/0k43313183j Homework Equations The Attempt at a Solution Ok i got a, b, and c. But i need help with d. My attempt was to find the force of block b - Tension of block C block B = sin(36.9)25 - the force on block b...