Work is performed whenever a force moves an object. When a person lifts an object, he or she is performing work. More work is done if the object is heavier or if it is lifted higher. Work, then, depends on the force acting on the object as well as the...

Earth's moon is held in orbit by an attractive gravitational force between Earth and the moon. Tides on Earth are due mainly to the gravitational pull of the moon on Earth. Any two masses whether or not Earth and the moon, experience a mutual...

Potential energy is the energy that something has because of its position or because of the arrangement of its parts. A baseball in flight has potential energy because of its position above the ground. A carbohydrate molecule has potential energy...

Gravitational energy is energy contained in the gravitational field. The relationship governing gravitational energy can be simply derived by noting that gravity is a conservative force, and the work done by a body in a gravitational field is equal to...

Potential energy can be thought of as energy stored within a physical system. This energy can be released or converted into other forms of energy, including kinetic energy. It is called potential energy because it has the potential to change the states...

Campbell, Ben Nighthorse Indian Country Today (Lakota Times) 04-24-2002 Almost one year ago, in May, 2001, President Bush unveiled his National Energy Policy, an ambitious plan to reduce the United States' dependence on foreign sources of energy by increasing domestic energy production and...

New Brunswick, New Jersey The study, "Assessment of Biomass Energy Potential for New Jersey," was conducted by the state's Agricultural Experiment Station, completed in July 2007. Objectives were to: 1) Assess the characteristics and quantity of New Jersey's biomass resources; 2) Assess technologies...

Industrial metals prices sank Tuesday after China, a major source of world demand, reported a sharp drop in May copper imports.Other commodity markets slumped. Crude oil and gasoline futures fell, while precious metals prices retreated. Agriculture futures finished mixed.China's imports of copper fell 28 percent...

Piles of corn cobs on Darrin Ihnen's family farm would have been considered field waste not too long ago. Now they represent potential energy.Poet, a Sioux Falls-based company, which has been making ethanol from corn for more than 20 years, is working with Ihnen and...