Write your answer on paper and give it to your facilitator. Heat engines are machines that burn some type of fuel to produce heat, then convert the heat energy into mechanical energy. Most heat engines burn gasoline to produce heat. In addition to the fuel, large amounts of air are needed for combusion. Fuel is burned outside the engine.
Fuel is burned inside the engine.
Fuel is compressed to a point where the temperature is high enough for spontaneous combustion. Write a paragraph explaining why two-cycle engines are made, even though they are inefficient. Physical Science 1. Ice absorbs heat from the water as it melts. This property causes pipes to break when the water in them freezes.