How do you calculate the efficiency of a heat engine?

To calculate the efficiency of a heat engine, divide the useful output energy by the input energy.

The efficiency of a heat engine is a measure of how much of the input energy is converted into useful output energy. It is calculated by dividing the useful output energy by the input energy. The useful output energy is the energy that is used to do work, while the input energy is the total energy that is supplied to the engine.

The efficiency of a heat engine is always less than 100%, as some of the input energy is always lost as waste heat. The efficiency can be improved by reducing the amount of waste heat that is produced, or by increasing the amount of useful output energy that is produced.

The efficiency of a heat engine can be expressed as a percentage or as a decimal. For example, an engine with an efficiency of 0.4 converts 40% of the input energy into useful output energy. The efficiency of a heat engine is an important factor in determining its performance and is often used to compare different types of engines.

In summary, the efficiency of a heat engine is calculated by dividing the useful output energy by the input energy. It is always less than 100% and can be improved by reducing waste heat or increasing useful output energy. The efficiency is expressed as a percentage or decimal and is an important factor in engine performance.