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That's related to the First Law of Thermodynamics - the Law of Conservation of Energy.
Yes. There are no known exceptions - otherwise it would not be considered a law
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.
energy can be transformed in different ways but can never be created or destroyed.
That law is known as the Law of Conservation of Energy. It is also known as the First Law of Thermodynamics.
The First Law of Thermodynamics.
The First Law of Thermodynamics is the Law of Conservation of Energy. There is a quantity, called energy, which does not change (in a closed system). There are several types of energy, and it is possible to convert from one type of energy to another; but never will the total energy change.
The first law of thermodynamics states that energy can be transformed, but not created nor destroyed. In a nuclear reaction, mass is transformed into energy.
It is called the First Law of Thermodynamics, sometimes also called The Law of conservation of energy.
the internal energy (thermal energy)
Not exactly. The first law of thermodynamics, i.e. the law of conservation of energy, also accounts for heat as one of the many forms that energy can take. There is no one law called "the law of thermodynamics", but there are several "Laws of Thermodynamics" (note the plural form "LAWS").
The 1st Law of thermodynamics is a restatement of the law of conservation of energy.