
gray kaa virodhabhas

graze paradox 1936 mein british prani vigyaani surr james gray dwara prastut ack paradox haye. virodhabhas yeh pataa lagaane key liye thaa kii dolphin itani uchch gati aur twaran kaise praapt curr sakate hain joe ack chhote seey maanspeshiyon key dravyamaan key roop mein dikhaai detaa haye. gray ney ack dolphin key shareer vigyaan key aadhar parr shakti kaa anuman lagaaya, aur nishkarsh nikala kii paani mein khinchaav balon koo door karane key liye shakti aparyaapt thee. unhone parikalpana kii kii dolphin kii twacha mein vishesh anty-dragg guna honey chaahiye.
2008 mein, renseller polytechnic sansthaan, west chester vishvavidyalaya aur california vishvavidyalaya, saanta cruze key shodhkartaon ney gray galat saabit karane key liye digital kann chhavi vegamaapak kaa upayog kiya.
rancellors school off engineering key professor aur karyavahak deane timothi way ney dou bottlenose dolphin, primo aur puka kaa video tape kiya, kyonki way saikadon hajaaron chhote havaa key bulbule seey bharey paani key ack hisse seey tairate hue. aerospace key liye vikasit computer software aur bull maapan upkaranon kaa upayog kann-chhavi vegamaapak kaa adhyayan karane key liye kiya gayaa thaa jise 1,000 frame prati sekand (fps) parr pakada gayaa thaa. isase dall koo ack dolphin dwara lagaae gaye bull koo maapane kaa mauka milaa. parinamon seey pataa chalaa kii dolphin harr baar apani poonchh koo dhakelane parr lagbhag 200 pound bull lagaata haye-gray parikalpana seey 10 gunaa adhik-aur charam bull 300 aur 400 pound key beach hoe sakata haye.
vee ney iss takneek kaa upayog dolphin koo film karane key liye bhee kiya kyonki way tail-stand curr rahey they, ack aisee chaal jahan dolphin apane shareer key adhikansh hisse koo paani key oopar urdhvaadhar pakadkar paani parr "chalate" hain aur apani poonchh key chhote, shaktishali thrust key saath khud koo sahaara dete hain.
2009 mein, taiwan mein rashtriya chung sing vishvavidyalaya key shodhkartaon ney talwar machhali kii tairaki kshamataon kii vyakhya karane key liye "apahrit airfoil" aur "parisanchari horse power" kii naee avadhaaranaon koo pesh kiya. talwar machhali dolphin kii tulanaa mein aur bhee adhik gati aur twaran parr tairati haye. shodhkartaon kaa daavaa haye kii unakaa vishleshan "dolphin key gray paradox kii ulajhan koo hull kartaa haye.
gray kii trutipurna dhaarana.
gray key virodhabhas kaa khandan karane key poorv shodh prayason ney kewal dolphin kii twacha key khinchaav koo cumm karane vaale pahalu koo dekhaa, lekin kabhi bhee gray kii mool dhaarana parr sawal naheen uthaaya "kii khinchaav maanspeshiyon key kaam seey adhik naheen hoe sakata haye" joe pahale sthaan parr virodhabhas kaa kaaran banaa. 2014 mein, uttar-paschimi vishvavidyalaya key saiddhaantik yaantrik engineeron kii ack team ney gray key virodhabhas kii antarnihit parikalpana koo galat saabit kiya. unhone ganitiya roop seey dikhaaya kii aniyamit tairaakon (jaise dolphin) parr khinchaav vaastav mein binaa virodhabhasi hue, khud koo aage badhaane key liye utpann honey vaali maanspeshiyon kii shakti seey adhik hoe sakata haye. unhone "oorjaa cascade" kii avadharana koo yeh dikhaane key liye pesh kiya kii sthir tairaki key dauran tairak (chipchipa apavyay key madhyam seey) key baad utpann sabhi maanspeshiyon kii shakti samaapt hoe jaati haye. ack tairak apane shareer koo utaarane key liye maanspeshiyon kii shakti kaa upayog kartaa haye, jisase usey ack saath kheenchane aur dhakka dene donon kaa anubhav hotaa haye. utpann maanspeshiyon kii shakti koo shareer koo vikrit karane key liye aavashyak shakti key barabar honah chaahiye, naa kii ise kheenchane kii shakti key barabar karna chaahiye. isake vipareet dragg power koo thrust power key barabar honah chaahiye. aisaa isaliye haye kyonki sthir tairaki key dauran, kheenchana aur dhakka parimaan mein barabar hotey hain lekin vipareet disha mein hotey hain. unake nishkarshon koo ack saral shakti santulan sameekaran mein sankshep mein prastut kiya jaa sakata haih
jisamen,
iss tathya koo sweekaar karna mahatvapurna haye kii ack tairak koo apane maanspeshiyon key kaam key madhyam seey khinchaav koo door karane key liye oorjaa kharch naheen karni padati haye; iss kaary mein jore bull dwara bhee isaki sahaayata kii jaati haye. unake shodh seey yeh bhee pataa chalata haye kii shareer parr khinchaav koo paribhaashit karna paribhaashit haye aur tairaki shareer parr kheenchane kii kaee paribhaashaaen saahitya mein prachalit hain. inmein seey kuchh paribhaashaaen maanspeshiyon kii shakti kii tulanaa mein adhik moolya dey sakati hain. haalaanki, yeh kissy bhee virodhabhas kii or naheen leey jaataa haye kyonki uchch khinchaav kaa matlab shakti santulan sameekaran mein uchch jore bhee haye, aur yeh kissy bhee oorjaa santulan siddhanton kaa ullanghan naheen kartaa haye.

