A diatomic ideal gas acts as a heat engine following a process described by the diagram below: Step 1. Isothermal expansion at ThotThot from volume VaVa to a final volume VbVb. The final volume is a factor kk times larger than the initial volume (ie. VbVb=kVakVa).
Step 2. Isobaric contraction from volume VbVb back to original volume VaVa, and cooling from ThotThot to TcTc
Step 3. Isochoric heating returning the system to its original state.

If there are n=82.4mols of the gas, the expansion factor kk=3.2, and initial temperature ThotThot=217.8K, what is the efficiency ee of this cyclic heat engine?

area of focus

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.