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 Efficiency and Conservation Block Grants and Reinvestment Act of 2009 appropriated $3.2 billion for the Energy Efficiency and Conservation Block Grant (EECBG) Program. Energy Efficiency and Conservation Block Grants The Energy Efficiency and Conservation Block Grant (EECBG) is a program in the United States, which provides federal grants to units of local government, Indian tribes, states, and territories to reduce energy use and fossil fuel emissions, and for improvements in energy efficiency. The EECBG Program is administered by the Office of Weatherization and Intergovernmental Programs in the Office of Energy Efficiency and Renewable Energy—EERE of the United States Department of Energy—DOE. The Energy Efficiency and