The dyne (symbol: dyn; from Ancient Greek δύναμις (dúnamis) 'power, force') is a derived unit of force specified in the centimetre–gram–second (CGS) system of units, a predecessor of the modern SI.
| dyne | |
|---|---|
| Unit system | CGS units |
| Unit of | force |
| Symbol | dyn |
| Conversions | |
| 1 dyn in ... | ... is equal to ... |
| CGS base units | 1 g⋅cm/s2 |
| SI units | 10−5 N |
| British Gravitational System | 2.248089×10−6 lbf |
History
The name dyne was first proposed as a CGS unit of force in 1873 by a Committee of the British Association for the Advancement of Science.
Definition
The dyne is defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared". 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".
One dyne is equal to 10 micronewtons, 10−5N or to 10 nsn (nanosthenes) in the old metre–tonne–second system of units.
- 1 dyn = 1 g⋅cm/s2 = 10−5 kg⋅m/s2 = 10−5 N
- 1 N = 1 kg⋅m/s2 = 105 g⋅cm/s2 = 105 dyn
| newton | dyne | kilogram-force, kilopond | pound-force | poundal | |
|---|---|---|---|---|---|
| 1 N | ≡ 1 kg⋅m/s2 | = 105 dyn | ≈ 0.10197 kp | ≈ 0.22481 lbF | ≈ 7.2330 pdl |
| 1 dyn | = 10−5 N | ≡ 1 g⋅cm/s2 | ≈ 1.0197×10−6 kp | ≈ 2.2481×10−6 lbF | ≈ 7.2330×10−5 pdl |
| 1 kp | = 9.80665 N | = 980665 dyn | ≡ gn × 1 kg | ≈ 2.2046 lbF | ≈ 70.932 pdl |
| 1 lbF | ≈ 4.448222 N | ≈ 444822 dyn | ≈ 0.45359 kp | ≡ gn × 1 lb | ≈ 32.174 pdl |
| 1 pdl | ≈ 0.138255 N | ≈ 13825 dyn | ≈ 0.014098 kp | ≈ 0.031081 lbF | ≡ 1 lb⋅ft/s2 |
| The value of gn (9.80665 m/s2) as used in the official definition of the kilogram-force is used here for all gravitational units. | |||||
Use
The dyne per centimetre is a unit traditionally used to measure surface tension. For example, the surface tension of distilled water is 71.99 dyn/cm at 25 °C (77 °F). (In SI units this is 71.99×10−3 N/m or 71.99 mN/m.)
See also
- Centimetre–gram–second system of units
- Erg
References
- Thomson, Sir Wl; Professor GC, Foster; Maxwell, Professor JC; Stoney, Mr GJ; Professor Flemming, Jenkin; Siemens, Dr; Bramwell, Mr FJ (September 1873). Everett, Professor (ed.). First Report of the Committee for the Selection and Nomenclature of Dynamical and Electrical Units. Forty-third Meeting of the British Association for the Advancement of Science. Bradford: Johna Murray. p. 224. Retrieved 8 April 2012.
- Gyllenbok, Jan (11 April 2018). "dyne". Encyclopaedia of Historical Metrology, Weights, and Measures. Vol. 1. Birkhäuser. p. 90. ISBN 9783319575988. Retrieved 20 April 2018.
- Beach, Chandler B., ed. (1914). . . Vol. II. Chicago: F. E. Compton and Co.
- Haynes, W.M.; Lide, D. R.; Bruno, T.J., eds. (2015). "Surface tension of common liquids". CRC Handbook of Chemistry and Physics (96nd ed.). CRC Press. p. 6-181. ISBN 9781482260977.
The dyne symbol dyn from Ancient Greek dynamis dunamis power force is a derived unit of force specified in the centimetre gram second CGS system of units a predecessor of the modern SI dyneUnit systemCGS unitsUnit offorceSymboldynConversions1 dyn in is equal to CGS base units 1 g cm s2 SI units 10 5 N British Gravitational System 2 248089 10 6 lbfHistoryThe name dyne was first proposed as a CGS unit of force in 1873 by a Committee of the British Association for the Advancement of Science DefinitionThe dyne is defined as the force required to accelerate a mass of one gram at a rate of one centimetre per second squared 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 One dyne is equal to 10 micronewtons 10 5N or to 10 nsn nanosthenes in the old metre tonne second system of units 1 dyn 1 g cm s2 10 5 kg m s2 10 5 N 1 N 1 kg m s2 105 g cm s2 105 dynUnits of force vte newton dyne kilogram force kilopond pound force poundal1 N 1 kg m s2 105 dyn 0 10197 kp 0 22481 lbF 7 2330 pdl1 dyn 10 5 N 1 g cm s2 1 0197 10 6 kp 2 2481 10 6 lbF 7 2330 10 5 pdl1 kp 9 80665 N 980665 dyn gn 1 kg 2 2046 lbF 70 932 pdl1 lbF 4 448222 N 444822 dyn 0 45359 kp gn 1 lb 32 174 pdl1 pdl 0 138255 N 13825 dyn 0 014098 kp 0 031081 lbF 1 lb ft s2The value of gn 9 80665 m s2 as used in the official definition of the kilogram force is used here for all gravitational units UseThe dyne per centimetre is a unit traditionally used to measure surface tension For example the surface tension of distilled water is 71 99 dyn cm at 25 C 77 F In SI units this is 71 99 10 3 N m or 71 99 mN m See alsoCentimetre gram second system of units ErgReferencesThomson Sir Wl Professor GC Foster Maxwell Professor JC Stoney Mr GJ Professor Flemming Jenkin Siemens Dr Bramwell Mr FJ September 1873 Everett Professor ed First Report of the Committee for the Selection and Nomenclature of Dynamical and Electrical Units Forty third Meeting of the British Association for the Advancement of Science Bradford Johna Murray p 224 Retrieved 8 April 2012 Gyllenbok Jan 11 April 2018 dyne Encyclopaedia of Historical Metrology Weights and Measures Vol 1 Birkhauser p 90 ISBN 9783319575988 Retrieved 20 April 2018 Beach Chandler B ed 1914 Dyne The New Student s Reference Work Vol II Chicago F E Compton and Co Haynes W M Lide D R Bruno T J eds 2015 Surface tension of common liquids CRC Handbook of Chemistry and Physics 96nd ed CRC Press p 6 181 ISBN 9781482260977
