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) = 10000000 Femtosecond (fs).
| Shake (shake) | Femtosecond (fs) |
|---|---|
| 0.1 | 1000000 |
| 0.5 | 5000000 |
| 1 | 10000000 |
| 2 | 20000000 |
| 5 | 50000000 |
| 10 | 100000000 |
| 25 | 250000000 |
| 50 | 500000000 |
| 100 | 1000000000 |
| 500 | 5000000000 |
| 1000 | 10000000000 |
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 femtosecond is a unit of time equal to 10⁻¹⁵ seconds — one quadrillionth of a second.
1 fs = 10⁻¹⁵ s = 0.001 ps = 1,000 as. Light travels about 0.3 µm in one femtosecond.
To convert fs to seconds: multiply by 10⁻¹⁵. To convert fs to picoseconds: divide by 1,000.
LASIK eye surgery uses femtosecond lasers. Also used in precision micro-machining and optical frequency combs.
A femtosecond is to one second as one second is to about 31.7 million years. The fastest chemical reactions occur on femtosecond timescales.
Confusing femtoseconds with picoseconds. Remember: fs is 1,000× shorter than ps.
Ahmed Zewail's Nobel-winning work proved we can 'photograph' chemical reactions happening in femtoseconds using ultrafast laser pulses.



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