# Dyne

The dyne (symbol dyn, from Greek δύναμις, dynamis, meaning power, force) is a derived unit of force specified in the centimetre–gram–second (CGS) system of units, a predecessor of the modern SI. The dyne is defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared".[1] One dyne is equal to 10 micronewtons, 10−5 N 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

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).[2] (In SI units this is 71.99×10−3 N/m or 71.99 mN/m.)

Units of force
newton
(SI unit)
dynekilogram-force,
kilopond
pound-forcepoundal
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 dyngn ⋅ (1 kg)≈ 2.2046 lbf≈ 70.932 pdl
1 lbf≈ 4.448222 N≈ 444822 dyn≈ 0.45359 kpgn ⋅ (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 as used in the official definition of the kilogram-force is used here for all gravitational units.

## History

The name dyne was first proposed as a C.G.S. unit of force in 1873 by a Committee of the British Association for the Advancement of Science.[3]

Other Languages
العربية: داين
asturianu: Dina
беларуская (тарашкевіца)‎: Дзіна (адзінка вымярэньня)
български: Дина
bosanski: Din
Deutsch: Dyn (Einheit)
Esperanto: Dino
euskara: Dina
فارسی: دین (یکا)
français: Dyne
galego: Dina
한국어: 다인
Bahasa Indonesia: Dyne
italiano: Dyne
македонски: Дин
Nederlands: Dyne

norsk: Dyn
norsk nynorsk: Dyn
oʻzbekcha/ўзбекча: Dina
polski: Dyna
português: Dina
română: Dină
Scots: Dyne
sicilianu: Dyne
slovenščina: Dina
srpskohrvatski / српскохрватски: Дин
suomi: Dyne
svenska: Dyn (enhet)
ไทย: ดายน์
Türkçe: Dyn
українська: Дина