The freon in air conditioners (home or car) and refrigerators changes from gas to a liquid and back to a gas, which then repeats. This is a physical change because the freon does not change its chemical makeup, just its state (liquid versus gas). A physical change is easily reversible. So the process can repeat and continue and keep us and our food cool.
The human hand is at the end of the arm and is composed of five digits. Index: second finger of the hand, next to the thumb. Second finger: middle finger of the hand. Third finger: second finger from the outside of the hand. Fourth finger: small finger closest to the outside of the hand. Distal phalanx: bone at the end of a finger. Middle phalanx: small, middle bone of a finger.
The cube (or third) root is the one-third power: The fourth root is the one-fourth power: The fifth root is the one-fifth power; and so on. Looking at the first examples, we can re-write them like this: You can enter fractional exponents on your calculator for evaluation, but you must remember to use parentheses.he fifth root is the one-fifth power; and so on. Looking at the first examples, we can re-write them like this: You can enter fractional exponents on your calculator for evaluation, but you must remember to use parentheses.