* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 12.4 Notes
Dark energy wikipedia , lookup
William Flynn Martin wikipedia , lookup
Energy storage wikipedia , lookup
Open energy system models wikipedia , lookup
Energy subsidies wikipedia , lookup
100% renewable energy wikipedia , lookup
Efficient energy use wikipedia , lookup
Potential energy wikipedia , lookup
Low-Income Home Energy Assistance Program wikipedia , lookup
Kinetic energy wikipedia , lookup
Zero-energy building wikipedia , lookup
Low-carbon economy wikipedia , lookup
World energy consumption wikipedia , lookup
Alternative energy wikipedia , lookup
Public schemes for energy efficient refurbishment wikipedia , lookup
Energy Charter Treaty wikipedia , lookup
Regenerative brake wikipedia , lookup
International Energy Agency wikipedia , lookup
Rebound effect (conservation) wikipedia , lookup
Energy policy of the United Kingdom wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Internal energy wikipedia , lookup
Energy harvesting wikipedia , lookup
Energy returned on energy invested wikipedia , lookup
Energy policy of Finland wikipedia , lookup
Distributed generation wikipedia , lookup
Energy in the United Kingdom wikipedia , lookup
Energy efficiency in transport wikipedia , lookup
Negawatt power wikipedia , lookup
Energy policy of the European Union wikipedia , lookup
Conservation of energy wikipedia , lookup
United States energy law wikipedia , lookup
Energy Independence and Security Act of 2007 wikipedia , lookup
Conservation of Energy (12.4) Notes Energy Potential energy can become ____________ energy, and kinetic energy can _____________ potential Trans- energy. Label the rollercoaster to show where the car has the greatest and least amount of potential and formations kinetic energy. Give two other examples in which potential energy is being transformed into kinetic energy and/or viseversa. 1. ____________________________________________________________________ 2. ____________________________________________________________________ The Law of State the law in its simplest form: _______________________________________________ Conservation of Energy The law of conservation of energy requires that at any given time, the __________ energy should be the ____________. Whenever the total energy in a system increases, it must be due to energy that enters the system from an _______________ source. None of the energy disappears; it just changes __________. To make studying a situation easier, scientists often limit their view to a small area or a small number of objects. These boundaries define a ____________. When the flow of energy into and out of a system is small enough that it can be ignored, the system is called a _____________ system. Most system are __________ systems, which exchange energy with the space that surrounds them. Efficiency of Machines Not all of the work done by a machine is _____________ work. Efficiency is the __________ of useful work out to work in, and is usually expressed as a percentage. Efficiency Equation: Perpetual motion machines (machines designed to go on forever without any input of energy) are _____________________ due to friction and air resistance.