The ammonia molecule nh3 has a dipole moment of 5.0 x 10^-30cm. ammonia molecules in the gas phase are placed in a uniform electric field e with magnitude 1.6×10^6 n/c. a) what is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to e from parallel to perpendicular? express your answer using two significant figures.
b) at what absolute temperature t is the average translational kinetic energy 3/2kt of a molecule equal to the change in potential energy calculated in part (a)? (note: above this temperature, thermal agitation prevents the dipoles from aligning with the electric field.) express your answer using two significant figures.