Instant · Precise · Universal
28 units available
6 categories total
To convert shakes to seconds: multiply by 10⁻⁸. To nanoseconds: multiply by 10.
1 shake = 10 ns = 10⁻⁸ s = 10,000 ps. A nuclear fission event takes about 1 shake.
For example, 1 Shake (shake) = 3.168809e-16 Year (Julian) (yr (Jul)).
| Shake (shake) | Year (Julian) (yr (Jul)) |
|---|---|
| 0.1 | 3.168809e-17 |
| 0.5 | 1.584404e-16 |
| 1 | 3.168809e-16 |
| 2 | 6.337618e-16 |
| 5 | 1.584404e-15 |
| 10 | 3.168809e-15 |
| 25 | 7.922022e-15 |
| 50 | 1.584404e-14 |
| 100 | 3.168809e-14 |
| 500 | 1.584404e-13 |
| 1000 | 3.168809e-13 |
A shake is an informal unit of time equal to 10 nanoseconds (10⁻⁸ seconds), used in nuclear physics.
1 shake = 10 ns = 10⁻⁸ s = 10,000 ps. A nuclear fission event takes about 1 shake.
To convert shakes to seconds: multiply by 10⁻⁸. To nanoseconds: multiply by 10.
Timing nuclear chain reactions, modeling neutron transport in reactors, and nuclear weapon physics calculations.
In a nuclear explosion, the chain reaction is complete in about 50–60 shakes (500–600 ns). The name reflects the era's dark humor.
Not recognizing 'shake' as a real unit. It's informal but precisely defined and still used in nuclear engineering.
A 'shake' = 10 nanoseconds. It was invented at Los Alamos to make nuclear timing calculations easier — humor in extreme circumstances.
The Julian year is a unit of time equal to exactly 365.25 days (31,557,600 seconds), used as a standard in astronomy.
1 Julian year = 365.25 days = 8,766 hours = 31,557,600 seconds exactly.
To convert Julian years to seconds: multiply by 31,557,600. To common years: multiply by 365.25/365.
Defining the light-year, expressing stellar evolutionary timescales, and standardizing astronomical time intervals.
The Julian year is exactly 365.25 days — no exceptions. This simplicity is why astronomers prefer it over the variable Gregorian year.
Confusing the Julian year (365.25 d) with the Julian calendar (which has a specific leap year pattern). They are related but distinct.
When astronomers say 'light-year,' they mean the distance light travels in one Julian year (365.25 days), not a calendar year.



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