In nuclear fission, a nucleus of uranium-238, which contains 92 protons, can divide into two smaller spheres, each having 46 protons and a radius of 5.90 x 10-15 m. What is the magnitude of the repulsive electric force pushing the two spheres apart?

A proton is initially at rest. After some time, a uniform electric field is turned on and the proton accelerates. The magnitude of the electric field is 1.81  105 N/C. (a) What is the speed of the proton after it has traveled 7.00 cm? (b) What is the speed of the proton after it has traveled 70.0 cm?

Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density λ = 1.00 μC/m and are 4.22 cm apart. What is the magnitude of the electric field at a point midway between them and 44.2 cm above the plane containing the two wires?

A spherical shell of an inner radius 20.0 cm and outer radius 25.0 cm has a charge with a uniform density of 24.62 nC/m3. A proton moves in a circular orbit outside the spherical shell at a distance of 49 cm from the centre of the shell. Calculate the speed (m/s) of the proton. Round off the answer to 2 decimal places.

Spheres A and B have the same initial positive charge. The magnitude of the repulsive electric force between the two spheres is 144 N when separated by a distance of 0.03 m. (a) Find the initial charge . (b) The spheres are then allowed to touch each other and then separated. Find the electric force between them if the radius of sphere A is three times that of sphere B. What is the magnitude and direction of the electric field at 0.25 m from a ? Find the flux through the top, left, and right sides of a cube of side 0.5 m when placed in a horizontal uniform electric field of 8.0 N/C directed to the right.

A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 2.0 cm away, in a time 1.5 X 10-8 s. (a) What is the speed of the electron as it strikes the second plate? (b) What is he magnitude of the electric field Ē?

Inside a vacuum tube, an electron is in the presence of a uniform electric field with a magnitude of 320 N/C. (a). What is the magnitude of the acceleration of the electron (in m/s2)?   m/s2     ?? (b). The electron is initially at rest. What is its speed (in m/s) after 1.15 ✕ 10−8 s? m/s ?