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The second law of thermodynamics states that
By the first law of thermodynamics, energy is conserved - i.e. the sum of the useful work and the energy lost to heat will equal the energy you started with. The second law states that you will never get 100% energy efficiency.
That is known by two different names: (1) Law of Conservation of Energy, (2) Second Law of Thermodynamics.
Because the second law of thermodynamics states that any use of energy always results in a decrease in the amount of "useful" energy.
By the first law of thermodynamics, energy is conserved - i.e. the sum of the useful work and the energy lost to heat will equal the energy you started with. The second law states that you will never get 100% energy efficiency.
The first law of thermodynamics states that the energy of an isolated system is constant.
It is the idea of a machine continuously producing energy, without energy input - or producing more energy than what is put into the machine. This would violate the First Law of Thermodynamics (conservation of energy), and in general, it is not believed to be possible. No process is known which violates the conservation of energy. (A "perpetual motion machine of the second kind" would violate the Second Law of Thermodynamics; this is generally believed to be impossible, too.)
For a start, the Law of Conservation of Energy. In case you don't know about it, I suggest you do some reading; it will help you understand not only that stars have to burn out, but several other things as well. Actually it would help to know about both the First Law of Thermodynamics (basically the Law of Conservation of Energy), and the Second Law of Thermodynamics.For a start, the Law of Conservation of Energy. In case you don't know about it, I suggest you do some reading; it will help you understand not only that stars have to burn out, but several other things as well. Actually it would help to know about both the First Law of Thermodynamics (basically the Law of Conservation of Energy), and the Second Law of Thermodynamics.For a start, the Law of Conservation of Energy. In case you don't know about it, I suggest you do some reading; it will help you understand not only that stars have to burn out, but several other things as well. Actually it would help to know about both the First Law of Thermodynamics (basically the Law of Conservation of Energy), and the Second Law of Thermodynamics.For a start, the Law of Conservation of Energy. In case you don't know about it, I suggest you do some reading; it will help you understand not only that stars have to burn out, but several other things as well. Actually it would help to know about both the First Law of Thermodynamics (basically the Law of Conservation of Energy), and the Second Law of Thermodynamics.
You can't create energy out of nothing (First Law of Thermodynamics); this is an experimentally established fact (i.e., no exceptions are known). Nowadays, the law of conservation of energy (or First Law of Thermodynamics) is often derived from Noether's Theorem, but that is some advanced math.You can convert one type of energy to another, but see also the Second Law of Thermodynamics.You can't create energy out of nothing (First Law of Thermodynamics); this is an experimentally established fact (i.e., no exceptions are known). Nowadays, the law of conservation of energy (or First Law of Thermodynamics) is often derived from Noether's Theorem, but that is some advanced math.You can convert one type of energy to another, but see also the Second Law of Thermodynamics.You can't create energy out of nothing (First Law of Thermodynamics); this is an experimentally established fact (i.e., no exceptions are known). Nowadays, the law of conservation of energy (or First Law of Thermodynamics) is often derived from Noether's Theorem, but that is some advanced math.You can convert one type of energy to another, but see also the Second Law of Thermodynamics.You can't create energy out of nothing (First Law of Thermodynamics); this is an experimentally established fact (i.e., no exceptions are known). Nowadays, the law of conservation of energy (or First Law of Thermodynamics) is often derived from Noether's Theorem, but that is some advanced math.You can convert one type of energy to another, but see also the Second Law of Thermodynamics.
Those would basically be the First and Second Laws of Thermodynamics. The First Law (energy conservation) states that the total energy can not be increased or decreased. The Second Law imposes some limitations about what conversions are possible.
According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.
Those would basically be the First and Second Laws of Thermodynamics. The First Law (energy conservation) states that the total energy can not be increased or decreased. The Second Law imposes some limitations about what conversions are possible.