Tarzan really wants to sweep Jane off her feet. He is standing on a tree branch 6m above and away from Jane. His plan is to swing down the vine and pick Jane up at the low point of the swing. What speed will he have when he makes contact with Jane?

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Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.