Assertion (A): No machine would continuously supply work without expen...
1st statement is PMM1 and it is correct and 2nd statement is 1st law..both are true.
Assertion (A): No machine would continuously supply work without expen...
Assertion (A): No machine would continuously supply work without expenditure of some other form of energy.
Reason (R): Energy can be neither created nor destroyed, but it can only be transformed from one form into another.
Explanation:
The assertion states that no machine would continuously supply work without expenditure of some other form of energy. This is true because of the law of conservation of energy. According to this law, energy can neither be created nor destroyed, but it can only be transformed from one form into another.
Supporting Arguments:
1. Law of Conservation of Energy: The law of conservation of energy states that the total energy of an isolated system remains constant over time. This means that energy cannot be created or destroyed within the system. Therefore, any machine that continuously supplies work must draw energy from an external source.
2. First Law of Thermodynamics: The first law of thermodynamics, also known as the law of energy conservation, states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. This law further supports the assertion that energy must be supplied to a machine in order for it to continuously supply work.
3. Examples of Machines: Examples of machines that require an input of energy to continuously supply work include engines, turbines, and generators. These machines convert energy from one form to another, such as converting chemical energy into mechanical energy or mechanical energy into electrical energy.
Explanation of Reason (R):
The reason states that energy can be neither created nor destroyed, but it can only be transformed from one form into another. This is known as the law of conservation of energy. It is a fundamental principle in physics and is supported by numerous experimental observations.
Conclusion:
Both the assertion and the reason are individually true, and the reason is the correct explanation of the assertion. The assertion is supported by the law of conservation of energy, which states that energy cannot be created or destroyed. Therefore, any machine that continuously supplies work must draw energy from an external source.