This is science...

1. In a hot-water heating system, room temperature is controlled by a device called an?________

2. Heat Engines convert which type of energy into mechanical work?
a. chemical
b. nuclear
c. thermal
d. elastic

3. How are internal combustion engines different from external combustion engines? Give examples of both types of engines.
_____________________

Respuesta :

1. Thermostat.
2. C. Thermal energy.
3. Internal combustion engines are those in which combustion takes place inside the engine. Examples are petrol or diesel engines. External combustion engines are those engines in which combustion takes place outside the engine. Examples are steam engine and steam turbines.