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Attonewton
Définitions de « attonewton »
Attonewton - Nom commun
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(Métrologie, Physique) Unité de mesure de force dans le Système international (SI), équivalente à 10^-18 newton. Symbole : aN.
Dans le domaine de la nanotechnologie où l'extrême précision est impérative, la mesure des forces se fait parfois en attonewtons, des unités si petites qu’elles équivalent à un milliardième de milliardième de newton.
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Étymologie de « attonewton »
Dérivé du mot newton, avec le préfixe atto-.Citations contenant le mot « attonewton »
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The gravitational force on the levitated particle was measured as a brass-weighted electrical bicycle wheel revolved about a meter away, altering the proximity of the weights to the particle. The gravitational force, contingent on the masses and distance between two objects, was observed in the experiment, where a half-milligram particle experienced a 30-attonewton force. An attonewton is one billionth of a billionth of a newton.
WION — Scientists measure gravity in Attonewton — up to one billionth of a billionth of a Newton - Science News -
In a clever tabletop experiment, researchers at Leiden University in the Netherlands, the University of Southampton in the UK, and the Institute for Photonics and Nanotechnologies in Italy measured a force of around 30 attonewtons on a particle with just under half a milligram of mass. An attonewton is a billionth of a billionth of a newton, the standard unit of force.
The Conversation — Gravity experiments on the kitchen table: why a tiny, tiny measurement may be a big leap forward for physics -
He and his team found that, with a 1 kilogram test mass spinning nearby, they could measure a force on the particle of 30 attonewtons. An attonewton is a billionth of a billionth of a newton. One limitation is that the test mass must be in motion at the right speed to create a gravitational resonance with the magnet, otherwise the force won’t be strong enough to be picked up.
New Scientist — Tiny magnet could help measure gravity on the quantum scale | New Scientist