| dyne | |
|---|---|
.JPG) Ohausspring scale displaying force measurements in bothnewtons and dynes | |
| General information | |
| Unit system | CGS units |
| Unit of | force |
| Symbol | dyn |
| Conversions | |
| 1 dynin ... | ... is equal to ... |
| CGS base units | 1 g⋅cm/s2 |
| SI units | 10−5 N |
| British Gravitational System | 2.248089×10−6 lbf |
Thedyne (symbol:dyn; from Ancient Greek δύναμις (dúnamis) 'power, force') is a derivedunit offorce specified in thecentimetre–gram–second (CGS) system of units, a predecessor of the modernSI.
The namedyne was first proposed as a CGS unit of force in 1873 by a Committee of theBritish Association for the Advancement of Science.[1]
The dyne is defined as "the force required to accelerate amass of onegram at a rate of onecentimetre persecond squared".[2] An equivalent definition of the dyne is "that force which, acting for one second, will produce a change of velocity of one centimetre per second in a mass of one gram".[3]
One dyne is equal to 10 micronewtons, 10−5N or to 10 nsn (nanosthenes) in the oldmetre–tonne–second system of units.
| Newtons | Dynes | Kilograms-force kiloponds | Pounds | Poundals | |
|---|---|---|---|---|---|
| 1 N | ≡ 1 kg⋅m⁄s2 | = 100000 dyn | ≈ 0.10197 kgf | ≈ 0.22481 lb | ≈ 7.23301 pdl |
| 1 dyn | = 1×10−5 N | ≡ 1 g⋅cm⁄s2 | ≈ 1.01972×10−6 kgf | ≈ 2.24809×10−6 lb | ≈ 7.23301×10−5 pdl |
| 1 kgf | = 9.80665 N | = 980665 dyn | ≡ gn × 1 kg | ≈ 2.20462 lb | ≈ 70.9316 pdl |
| 1 lb | ≈ 4.44822 N | ≈ 444822 dyn | ≈ 0.45359 kgf | ≡ gn × 1 lbm / .3048 m⁄ft | ≈ 32.1740 pdl |
| 1 pdl | ≈ 0.13825 N | ≈ 13825.5 dyn | ≈ 0.01410 kgf | ≈ 0.03108 lbf | ≡ 1 lbm⋅ft⁄s2 |
Thedyne per centimetre is a unit traditionally used to measuresurface tension. For example, the surface tension of distilled water is 71.99 dyn/cm at 25 °C (77 °F).[4] (In SI units this is71.99×10−3 N/m or71.99 mN/m.)
