Question

A hemispherical shell (half-sphere like a bowl) of radius a = 30 cm, centered at the origin (i.e. the same center as the full sphere would have), has a surface charge density of = ()/(). This half-sphere covers / and . [The charges on this surface are negative]. a. Determine the electrostatic potential at the center of this hemisphere (in volts). b. What speed does an electron ( = . ; = .1 x10 ) reach if you release it from the original rest? [The electron will experience a repulsive electrostatic force and accelerate towards infinity. We are asks to determine its speed when it reaches infinity. Suppose the only force acting on the electron is this electrostatic force. [Hint: kinetic energy =(/)]].