An electron moving horizontally to the right with speed v enters a region where a uniform magnetic field exists pointing into the page with magnitude b. As a result the electron executes uniform circular motion with radius r. What is the total work done by the magnetic field during a half cycle of the electron’s motion in the field?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90