Defined as the study of the mind and its behavior, psychology has broad applications in the modern world. The psychology degree is popular: the American Psychological Association states that psychology is the fourth most common major among U.S. students. Aside from academia, research and clinical counseling, a wealth of employment options exist.
rotating anode. focal track made of tungsten -rhenium which spins on the copper anode rotor and has molybdenum backing because these metals conducts it draws the heat away from the anode. - because the anode is rotating the electrons dont hit at the same spot everytime so the anode does not over heat. focal spot.
For All Water Heaters. 1  Check the Anode Rod - sacrificial anode rods are typically constructed of aluminum or magnesium formed around a steel wire. They help prevent your hot water tank from rusting and should be changed when the steel wire is showing. If you have two anode rods, be sure to check both of them regularly.