Time (Orders of magnitude)
In the context of time, an order of magnitude is a description of the quantity of a time in respect to comparison between differing magnitudes. In common usage, the scale is usually the base10 or base−10 exponent being applied to an amount, making the order of magnitude 10 times greater or smaller. As the differences are measured in factors of 10, a logarithmic scale is applied. In terms of time, the relationship between the smallest limit of time, the Planck time, and the next order of magnitude larger is 10.
centisecond
20 ms: cycle time for European 50 Hz AC electricity
decisecond
185 ms: the duration of a full rotation of the main rotor on Bell 205, 212 and 412 helicopters (normal rotor speed is 324 RPM)
6 s: time it takes for a human to breathe
40 s: Time til cyanide starts acting
60 s: 1 minute
600 s: Half-life of Neutronium
2.6 Ms: approximately 1 month
31.6 Ms: approximately 1 year ≈ 107.50 s
2.1 Gs: average human life expectancy at birth (2011 estimate)
3.16 Gs: approximately 1 century
31.6 Gs: approximately 1 millennium
6 Ts: Time since the appearance of Homo sapiens (approximately)
80 Ts: Time it takes for light to travel from the Andromeda Galaxy to the Milky Way.
160–220 Ts: Time since the divergence of the human and chimpanzee lineages.
7.1–7.9 Ps: 1 galactic year (225-250 million years)
143 Ps: the age of the Earth
144 Ps: the approximate age of the Solar system and the Sun.
430 Ps: the approximate age of the Universe
440 Ps: the half-life of thorium 232
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