Decade ("60s" or "sixties"), although this may leave it uncertain which century is meant. These references are frequently used to encapsulate popular culture or other widespread phenomena that dominated such a decade, as in "The Great Depression of the 1930s" or "The Roaring Twenties". However, the Gregorian calendar begins with the year 1. (There is no year "zero", and the year before AD 1 is 1 BC with nothing in between.) Therefore, its "first" decade is from AD 1 to AD 10, the "second" decade from AD 11 to AD 20, and so on. So, although "the 1960s" comprises the years
Decade (log scale) factor-of-ten is what is important, not the unit used, so 3.14 rad/s is one decade down from 31.4 rad/s. To determine the number of decades between two frequencies (formula_1 & formula_2), use the logarithm of the ratio of the two values: or, using natural logarithms: To find out what frequency is a certain number of decades from the original frequency, multiply by appropriate powers of 10: To find out the size of a step for a certain number of frequencies per decade, raise 10 to the power of the inverse of the number of steps: Decades on a logarithmic scale,