1. Heat engines use thermal energy by heating up the substance inside. When it heats up, turns into a gas, and expands it is then pushed through the turbine. The turbine uses it to power the engine.
2. In an internal combustion engine the feul is burnt inside the cylinder(diesel engine) whereas an external combustion engine the fluid is being heated from an external source. They are similar b/c they both burn/process feul inside of the engine.
3. They use internal combustion engines b/c it would take a lot more feul and work to keep the car running,
4. Evaporation and Condensation occur
5. If the compressor stopped working then the refrigerator wouldn't work because the compressor is the motor and if broke then it wouldn't run and it would get hot inside.
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