Newton's cradle Newton's cradle Newton’s cradle is a device that demonstrates conservation of momentum and energy using a series of swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward. The last sphere swings back and strikes the still nearly stationary spheres, repeating the effect in the opposite direction. The device is named after 17th-century English scientist Sir Isaac Newton. It is also known as Newton's balls or Executive Ball Clicker. A typical Newton's cradle consists of a series of identically sized
Energy Policy and Conservation Act Traffic Safety Administration was given the authority to regulate fuel economies for automobiles and light trucks. Part B of Title III of the EPCA established the Energy Conservation Program, which gives the Department of Energy the "authority to develop, revise, and implement minimum energy conservation standards for appliances and equipment." As currently implemented, the Department of Energy currently enforces test procedures and minimum standards for more than 50 products covering residential, commercial and industrial, lighting, and plumbing applications. The law has banned crude oil exports, with the U.S. Commerce Department able to grant exceptions for certain types of oil. In