Digit 'clicked' in finger snap reaches palm in seven MILLISECONDS

The science behind the finger snap: Tip of the digit that is ‘clickedreaches the palm in just seven MILLISECONDS — 20 times faster than the blink of an eye, studie bevind

  • Finger snapping is the fastest acceleration the human body is able to produce
  • Georgia Tech-led researchers measured a variety of different finger snaps
  • They used different thimbles to show the critical role friction plays in the action
  • Marvel’s Thanos wouldn’t have been able to snap in his gauntlet, het die span gevind
  • This is because metal gloves reduce the compressibility and friction of fingers
  • Whether you’re disintegrating half of all life in the universe like Marvel’s Thanos, or just doing your best Addams Family impression, here’s something to think about: finger snapping is the fastest acceleration the human body is able to produce — with the tip of the ‘clickeddigit reaching the palm in just seven milliseconds.

    This is more than 20 times faster than the blink of an eye, Georgia Institute of Technology-led experts determined after measuring a variety of finger snaps.

    The right amount of friction is key for storing up energy for a good snap, hulle het gevind, meaning a real-life Thanos might have trouble bringing his evil scheme to fruition.

    Alongside satisfying raw curiosity about how finger snapping works from a physics standpoint, the findings may help develop more versatile prosthetics, het die span gesê.

    Blaai af vir video

    Whether you're disintegrating half of all life in the universe like Marvel's Thanos (op die foto), or just doing your best Addams Family impression, here's something to think about: Finger snapping is the fastest acceleration the human body is able to produce ¿ with the tip of the 'clicked' digit reaching the palm in just seven milliseconds

    Whether you’re disintegrating half of all life in the universe like Marvel’s Thanos (op die foto), or just doing your best Addams Family impression, here’s something to think about: Finger snapping is the fastest acceleration the human body is able to produce — with the tip of the ‘clickeddigit reaching the palm in just seven milliseconds

    Finger snaps (op die foto) occur more than 20 times faster than the blink of an eye ¿ and with rotational accelerations three times that of the arms of professional baseball pitchers (reg) Georgia Tech experts determined after measuring a variety of finger snaps

    Finger snaps (op die foto) occur more than 20 times faster than the blink of an eye — and with rotational accelerations three times that of the arms of professional baseball pitchers (reg) Georgia Tech experts determined after measuring a variety of finger snaps

    SNAPPING ANIMALS

    Ultra-fast movements equivalent to human finger snapping can be seen in many other species of animal.

    Dit sluit in, byvoorbeeld:

    • Termites
    • Snapping ants
    • Trap jaw ants
    • Froghoppers
    • Mantis shrimps

    All rely on a spring and latching mechanism for their rapid movements — allowing them to store up energy before quickly releasing it.

    Advertensie

    ‘Die afgelope paar jaar, I’ve been fascinated with how we can snap our fingers,’ said paper author and biophysicist Saad Bhamla of Georgia Tech.

    ‘It’s really an extraordinary physics puzzle right at our fingertips that hasn’t been investigated closely.

    To learn more, the team turned their earlier research, which had devised a general framework for explaining the ultrafast motion seen in some other living organisms, soos, byvoorbeeld, snapping ant and termite species.

    These studies had indicated that these creatures all rely on a spring and latching mechanism for their rapid movements, allowing them to store up energy before quickly releasing it.

    In a finger snap, this manifests in a three-stage process, beginning with the thumb and middle finger being pressed together, storing up energy in tendons.

    Friction between the digits serves as a latch, initially preventing the energy from being released, until — with an audible snap — the middle finger slips past the thumb and hits the palm.

    Unlike other biological spring and latch systems, egter, the team suspected that skin friction would play a more significant role in finger snaps.

    In hul studie, Professor Bhamla and colleagues used a combination of dynamic force sensors, high-speed photography and automated image processing to analyse various finger snaps, using different thimbles to explore the role friction plays.

    Byvoorbeeld, one test saw the team finger snap while donning metallic thimbles, allowing them to explore the effects of snapping while wearing a metal gauntlet, much like one worn by Thanos that bore the powerful Infinity Stones.

    'Die afgelope paar jaar, I¿ve been fascinated with how we can snap our fingers,' said paper author and biophysicist Saad Bhamla (op die foto) of Georgia Tech. 'It¿s really an extraordinary physics puzzle right at our fingertips that hasn¿t been investigated closely'

    ‘Die afgelope paar jaar, I’ve been fascinated with how we can snap our fingers,’ said paper author and biophysicist Saad Bhamla (op die foto) of Georgia Tech. ‘It’s really an extraordinary physics puzzle right at our fingertips that hasn’t been investigated closely

    In hul studie, Professor Bhamla and colleagues used a combination of dynamic force sensors, high-speed photography and automated image processing to analyse various finger snaps, using different thimbles to explore the role friction plays. Op die foto: a composite image showing the motion of a finger snap at different points in the movement

    In hul studie, Professor Bhamla and colleagues used a combination of dynamic force sensors, high-speed photography and automated image processing to analyse various finger snaps, using different thimbles to explore the role friction plays. Op die foto: a composite image showing the motion of a finger snap at different points in the movement

    For an ‘ordinarysnap with bare fingers, the researchers measured maximum rotational velocities of some 7,800 degrees per second and rotational accelerations of 1.6 million degrees per second squared.

    While the rotational velocity is not the fastest that humans can achieve — this title goes to the arm movements of professional baseball pitchers — the acceleration of the snap is a record breaker, beating pitchersarms by a factor of three.

    ‘When I first saw the data, I jumped out of my chair,’ said Professor Bhamla.

    ‘The finger snap occurs in only seven milliseconds, more than twenty times faster than the blink of an eye, which takes more than 150 milliseconds,’ hy het bygevoeg.

    For an 'ordinary' snap, with bare fingers, the researchers measured maximum rotational velocities of some 7,800 degrees per second and rotational accelerations of 1.6 million degrees per second squared

    For an ‘ordinary’ snap, with bare fingers, the researchers measured maximum rotational velocities of some 7,800 degrees per second and rotational accelerations of 1.6 million degrees per second squared

    'When I first saw the data, I jumped out of my chair,' said Professor Bhamla. 'The finger snap occurs in only seven milliseconds, more than twenty times faster than the blink of an eye, which takes more than 150 milliseconds,' hy het bygevoeg. Op die foto: the Addams Family snapping

    ‘When I first saw the data, I jumped out of my chair,’ said Professor Bhamla. ‘The finger snap occurs in only seven milliseconds, more than twenty times faster than the blink of an eye, which takes more than 150 milliseconds,’ hy het bygevoeg. Op die foto: the Addams Family snapping

    When the researchers conducted tests with metal thimbles, egter, they found that the maximum rotational velocities they recorded decreased dramatically — which is bad news for a certain cinematic Mad Titan.

    ‘Our results suggest that Thanos could not have snapped because of his metal armoured fingers,’ said paper author and Georgia Tech undergraduate student Raghav Acharya.

    ‘So, it’s probably the Hollywood special effects, rather than actual physics, at play! Sorry for the spoiler,’ het hy geskerts.

    The drawback of metal gauntlets, the team explains, comes from how they reduce the finger-to-finger contact area when compared to gloved fingers.

    ‘The compression of the skin makes the system a little bit more fault tolerant,’ added paper co-author and bioengineer Elio Challita, also of Georgia Tech.

    ‘Reducing both the compressibility and friction of the skin make it a lot harder to build up enough force in your fingers to actually snap.

    The same issue, het die span verduidelik, meant that their test subjects were also unable to snap their fingers when wearing lubricated gloves.

    Thanos' infinity gauntlet, op die foto

    When the team experimented with rubber thimbles, they found that too much friction, led to the fingers taking too long to slide past each other

    There is a ‘Goldilocks zonewhere the level of friction is ‘just rightfor snapping, het die navorsers gesê. Te min, like with metal thimbles (or Thanosinfinity gauntlet), and it wasn’t possible to store enough energy to power the snap. Too much friction, egter, led to the fingers taking too long to slide past each other — dissipating much of the stored energy as heat, as was seen when the team experimented with rubber thimbles

    Based on this finding, one might expect that increasing the friction between one’s fingers would make for a faster snap.

    Egter, tests with rubber thimbles revealed to the team that this isn’t always the case.

    In werklikheid, het die navorsers gesê, there is a ‘Goldilocks zonewhere the level of friction is ‘just right’. Te min, like with the metal thimbles, and it wasn’t possible to store enough energy to power the snap.

    Too much friction, egter, led to the fingers taking too long to slide past each other, dissipating much of the stored energy as heat.

    The drawback of metal gauntlets, the team explains, comes from how the reduce the finger-to-finger contact area when compared to gloved fingers

    The drawback of metal gauntlets, the team explains, comes from how the reduce the finger-to-finger contact area when compared to gloved fingers

    To explain their observations, the team explored a variety of mathematical models, finally settling on one that factored in both a spring and a soft friction contact-latch.

    ‘We included soft frictional contact into our mathematical model, and the results reinforced the central role played by friction in achieving ultrafast motions,’ said paper author and physicist Mark Ilton of California’s Harvey Mudd College.

    ‘This model can now help us understand how other animals such as termites and ants snap their mandibles, as well as rationally bioinspired actuators for engineering applications,’ hy het bygevoeg.

    To explain their observations, the team explored a variety of mathematical models, finally settling on one that factored in both a spring and a soft friction contact-latch (Caltech-navorsers het bevind dat wat na een aardbewing gelyk het, in werklikheid 'n reeks van vyf was)

    To explain their observations, the team explored a variety of mathematical models, finally settling on one that factored in both a spring and a soft friction contact-latch (Caltech-navorsers het bevind dat wat na een aardbewing gelyk het, in werklikheid 'n reeks van vyf was)

    ‘The research of Dr Bhamla and his colleagues is a great example of what we can learn with clever experiments and insightful computational modelling, said John Long of the National Science Foundation, which funds the team’s research.

    ‘By showing that varying degrees of friction between the fingers alters the elastic performance of the snap, they’ve opened the door for discovering these principles operating in other organisms.

    Die bevindinge, hy het bygevoeg, could also help in ‘putting this soft, sophisticated and adjustable mechanism to work in engineered systems such as bioinspired robots.

    'Based on ancient Greek art from 300 BC, humans may very well have been snapping their fingers for hundreds of thousands of years before that, yet we are only now beginning to scientifically study it,' noted Professor Bhamla. Op die foto: the earliest known illustration of a human snapping their fingers, which comes on this Greek wine jug from Apulia, c 320-3VC BC

    ‘Based on ancient Greek art from 300 VC, humans may very well have been snapping their fingers for hundreds of thousands of years before that, yet we are only now beginning to scientifically study it,’ noted Professor Bhamla. Op die foto: the earliest known illustration of a human snapping their fingers, which comes on this Greek wine jug from Apulia, c 320-310 VC

    Volgens die span, the results also open up a number of more immediate avenues for their research, including working to determine why humans can snap in the first place and whether any other primates have also evolved this ability.

    ‘Based on ancient Greek art from 300 VC, humans may very well have been snapping their fingers for hundreds of thousands of years before that, yet we are only now beginning to scientifically study it,’ noted Professor Bhamla.

    ‘This is the only scientific project in my lab in which we could snap our fingers and get data!,’ het hy gekwis.

    Die volledige bevindings van die studie is in die Journal of The Royal Society Interface.








    WAT STUDIES OOR VINGERLENGTE WYS?

    SAKE – Dit is meer waarskynlik dat vroue met lang wysvingers sake het

    Women with long index fingers on their left hands are more likely to have affairs, a study by Oxford University revealed.

    The findings surprised scientists as having a longer index finger is associated with having more typical female characteristics.

    Die langer wysvinger en korter ringvinger is gekoppel aan blootstelling aan hoër vlakke van vroulike geslagshormone in die baarmoeder.

    Daar is aanvaar dat vroue wat 'meer gefeminiseerd' was meer geneig sou wees om tevrede te wees met hul romantiese verhoudings, en om minder impulsief te wees.

    Om meer blootgestel te word aan die geslagshormoon estrogeen in die baarmoeder, lei daartoe dat vroue se wysvingers langer groei as hul ringvinger.

    In kontras met, blootstelling aan meer van die manlike geslagshormoon testosteroon in die baarmoeder het 'n meer 'manlike' effek – en lei tot 'n langer ringvinger en 'n korter wysvinger.

    SEKSUALITEIT – Vroue met langer ringvingers is meer geneig om lesbies te wees

    Women whose ring fingers are longer than their index digits more likely to be lesbian, Volgens a study by Essex University.

    Researchers looked at sets of identical twins where one of the siblings was heterosexual.

    Hulle het bevind dat die homoseksuele tweeling 'n groter verskil het tussen die lengte van hul wys en die ringvinger, met die verskil wat die meeste onder vroue voorkom.

    Vorige navorsing het aangedui dat blootstelling aan die manlike hormoon testosteroon in die baarmoeder gekoppel kan word aan verskille in vingerlengte en ook aan seksualiteit.

    Vroue se wys- en ringvingers is gewoonlik van dieselfde lengte, terwyl daar 'n groter verskil by mans is.

    Beide mans en vroue word blootgestel aan die 'mannetjie’ hormoon testosteroon in die baarmoeder.

    STEM – Babas is meer geneig om piepende stemme te hê as die wysvinger langer is as hul ringvinger

    University of Sussex scientists found there could be a link between the length of a child’s fingers and the pitch of their voice.

    Dit is meer waarskynlik dat 'n baba 'n piepende stem het as die wysvinger aan hul regterhand langer is as die ringvinger, die navorsing voorgestel.

    Net so, wetenskaplikes het gesê dat die verband waarskynlik die gevolg is van 'n gebrek aan testosteroon in die baarmoeder.

    Testosteroon is bekend as die sleutel tot vroeë liggaamsgroei en speel 'n belangrike rol in die ontwikkeling van vokale toonhoogte tydens puberteit.

    WERK – Dit is meer waarskynlik dat vroue met lang ringvingers tradisioneel vroulike werk het

    'N Vrou se beroepskeuse hang saam met die lengte van haar vingers, according to a study by the National Research University in Russia.

    Vroue wie se wysvinger kort was in vergelyking met hul ringvinger, het meer geneig om 'n tradisionele manlike werk te hê, soos 'n prokureur of 'n bestuurder in die industrie, het die navorsers bevind.

    En diegene wie se wysvinger langer as hul ringvinger was, sou meer geneig wees om in 'n stereotiepe vroulike loopbaan te werk, soos verpleegkunde of laerskoolonderrig.

    Vir die studie, navorsers van die Nasionale Navorsingsuniversiteit in Rusland het data van ontleed 1,500 mans en vroue wie se vingers met behulp van digitale kalipers gemeet is.

    Hulle het bevind dat beduidende verskille in die 2D:4D verskille is slegs waargeneem vir vroue en meestal vir die linkerhand.

    DEEL – Kinders met langer ringvingers deel minder

    Kinders wat wysvingers korter as hul ringvingers het, deel minder hul speelgoed, research by the University of Vienna suggests.

    Bewyse bestaan ​​reeds om aan te toon dat hulle aggressiewer is – maar die nuwe studie toon dat hulle ook meer selfsugtig is – en sal nie eers met vriende deel nie.

    Dit is bekend dat diegene wat 'n korter vinger het as hul ringvinger, aan groter hoeveelhede testosteroon in die baarmoeder blootgestel word omdat die hormoon die ontwikkeling van die vingerlengte beïnvloed..

    Antropoloë voer aan dat hoër vlakke van die hormoon tydens swangerskap tot 'n 'manlike effek' lei’ by beide seuns en dogters. Testosteroonvlakke bly hoog soos kinders ouer word.

    Oostenrykse kenners het die gewoontes van tientalle seuns en meisies opgemerk, aangesien hulle gekies het om glitterende plakkers te kry om die slotsom te maak.

    Advertensie