10
AssignmentMultiple Dropdowns

Lesson 5: First Law of Thermodynamics

Question 10 • TX-Physics CR

These steps are involved in the production of work by a four-stroke heat engine. Place the steps in the correct order.

Answer
Piston moves up, compressing gas and causing gas to increase its temperature::

2

Piston moves up, pushing burned gases through exhaust valve::

4

Spark plug fires, causing combustion as gas is still compressed; increase in energy from combustion pushes piston down::

3

Piston moves down, allowing fuel-air mixture to enter intake valve::

1