An electric motor has an effective resistance of 32.0 ohms and an inductive reactance of 45.0 ohms when working underload. the rms voltage across the alternating source is 420 v. calculate the rms current

=force × distance a. work b. velocity c. pressure d. momentum

What sort of waves exhibit the doppler effect?

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.