A heart surgeon monitors the flow rate of blood through an artery using an electromagnetic flowmeter (see figure below).

A heart surgeon monitors the flow rate of blood through an artery using an electromagnetic flowmeter (see figure below). Electrodes A and B make contact with the outer surface of the blood vessel, which has a diameter of 2.82 mm. For a magnetic field magnitude of 0.039 2 T, an emf of 145 µV appears between the electrodes. Calculate the speed of the blood.