Compute all parts of following problem given below:

Problem: Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. Each ball has the same magnitude of charge of 10 nC, but with opposite sign. The rod is held in a 1.0*10^4 N/C uniform electric field at the angle of 30 degrees, then released to rotate around its center of mass.

Part A: What is the dipole moment of the rod?

Part B: Calculate the magnitude of the torque exerted on the rod by the electric field.

Part C: Obtain the moment of inertia around the center of mass.

Part D: What is the initial angular acceleration when the rod is released?

I want help to calculate the initial angular acceleration when the rod is released.