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 smallest natural number is 1 and there is no largest natural number. Digits. Numbers are formed using the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. These symbols are called digits or figures. To find the place value of a digit in a number, multiply the digit with the value of the place it occupies.Comparison of numbers. If two numbers have an unequal number of digits, then the number with the greater number of digits is greater.umbers are formed using the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. These symbols are called digits or figures. To find the place value of a digit in a number, multiply the digit with the value of the place it occupies. Comparison of numbers.