A square conducting plate 45.0 cm on a side and with no net charge is placed in a region, where there is a uniform electric field of 78.0 kN/C directed to the right and perpendicular to the plate. Required:
a. Find the charge density of each face of the plate.
b. Find the total charge on each face.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.