Recent content by stonnn

for the first one, do we just get the magnetic field total? This is what i did. Btotal = B1 + B2 B1 = MoI/2IIr ---> [(1.26X10^-6)(5)/(6.28)(15) B2 = MoI/2IIr ---> [(1.26x10^-6)(5)/(6.28)(0.05) Is that right? for the second one, I calculated magnetic field first. Then, used this equation...

1. Two parallel wires 0.200 m apart carry currents in opposite directions of 5.00 A. Find the magnetic field between the wires 0.0500 m from one of them and 0.150 m from the other. 2. A long straight wire carries a current of 100. A. a. What is the force on an electron traveling parallel to...

i really have no clue how to do these. they seem more conceptual. any hints would be welcome! thanks! 1. Prove that when n identical resistors of resistance R are connected in parallel the equivalent resistance is R/n. 2. A piece of copper wire of resistance R is cut into 3 equal parts...

thanks for the hints, i'll work on them some more!

1) A 1.0-kg object moving in a certain direction has a kinetic energy of 2.0 J. It hits a wall and comes back with half its original speed. What is the kinetic energy of this object at this point? Attempt at solution: 1/2mv^2 = 1/2m(0.5)v^2 2) An object of mass 10.0 kg is released from the...

thank you so much!

1) A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision? Relevant equations: m1v1 - m2v2 = (m1+ m2) vfinal My attempt: This is an inelastic collision because the...