law of conservation of energy
Answers
Answer:
physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. Wikipedia
Calculation
Theory
Formula
K_{1}+U_{1} =K_{2}+U_{2}
K_{1} = initial kinetic energy
U_{1} = initial potential energy
K_{2} = final kinetic energy
U_{2} = final potential energy
Answer:
The law of conservation of energy states that energy can neither be created nor be destroyed. Although, it may be transformed from one form to another. If you take all forms of energy into account, the total energy of an isolated system always remains constant. All the forms of energy follow the law of conservation of energy. In brief, the law of conservation of energy states that in a closed system, i.e., a system that is isolated from its surroundings, the total energy of the system is conserved.
For example
•In a torch, the chemical energy of the batteries is converted into electrical energy, which is converted into light and heat energy.
•In hydroelectric power plants, waterfalls on the turbines from a height. This, in turn, rotates the turbines and generates electricity. Hence, the potential energy of water is converted into the kinetic energy of the turbine, which is further converted into electrical energy.
•In a loudspeaker, electrical energy is converted into sound energy.
•In a microphone, sound energy is converted into electrical energy.
•In a generator, mechanical energy is converted into electrical energy.
When fuels are burnt, chemical energy is converted into heat and light energy.
•Chemical energy from food is converted to thermal energy when it is broken down in the body and is used to keep it warm.