Mechanical energy swing because of the work done by the pendulum to oppose these non-conservative forces. That the loss of mechanical energy in a system always resulted in an increase of the system's temperature has been known for a long time, but it was the amateur physicist James Prescott Joule who first experimentally demonstrated how a certain amount of work done against friction resulted in a definite quantity of heat which should be conceived as the random motions of the particles that comprise matter. This equivalence between mechanical energy and heat is especially important when considering colliding objects. In an elastic collision,
Dalian University of Foreign Languages Dalian University of Foreign Languages Dalian University of Foreign Languages (DLUFL; ) is a public university in Dalian, Liaoning, China and one of the top foreign language institutes in mainland China. Formerly known as Dalian School of Japanese Language, DLUFL was founded in 1964 with the help of the late Chinese Premier Zhou Enlai. It is now under the administration of the Education Commission of Liaoning Province. Through 40 years of development, DLUFL has fledged into a multi-disciplinary foreign language university which also offers programs in other fields like arts, economics, management, engineering and law. In 2007, the university moves