Dyne
- Dynes redirects here. For the president of the University of California system, see Robert C. Dynes.
In physics, the dyne (symbol "dyn", from Greek δύναμις (dynamis) meaning power, force) is a unit of force specified in the centimetre-gram-second (CGS) system of units, a predecessor of the modern SI. One dyne is equal to exactly 10 micronewtons. Further, the dyne can be defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared".
Dynes per centimetre is the measurement usually associated with measuring surface tension. For example, the surface tension of distilled water is 72 dyn/cm at 25 °C (77 °F).
newton (SI unit) |
dyne | kilogram-force, kilopond |
pound-force | poundal | |
---|---|---|---|---|---|
1 N | ≡ 1 kg·m/s² | = 10^{5} dyn | ≈ 0.10197 kp | ≈ 0.22481 lb_{f} | ≈ 7.2330 pdl |
1 dyn | = 10^{−5} N | ≡ 1 g·cm/s² | ≈ 1.0197×10^{−6} kp | ≈ 2.2481×10^{−6} lb_{f} | ≈ 7.2330×10^{−5} pdl |
1 kp | = 9.80665 N | = 980665 dyn | ≡ g_{n}·(1 kg) | ≈ 2.2046 lb_{f} | ≈ 70.932 pdl |
1 lb_{f} | ≈ 4.448222 N | ≈ 444822 dyn | ≈ 0.45359 kp | ≡ g_{n}·(1 lb) | ≈ 32.174 pdl |
1 pdl | ≈ 0.138255 N | ≈ 13825 dyn | ≈ 0.014098 kp | ≈ 0.031081 lb_{f} | ≡ 1 lb·ft/s² |
The value of g_{n} as used in the official definition of the kilogram-force is used here for all gravitational units. |
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