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The world is full of beautiful equations , numbers and calculations . From matter astragal as tot to managing funds as adults , we employ math every day . But scientist often go beyond these routine conformation of reckoning , to measure , weigh and tally far unknown things in the universe . From the act of bubbles in a distinctive looking glass of beer to the weighting of all the coronavirus particles circulating in the humanity , here are 10 weird things scientist calculated in 2021 .
Related : pic : big numbers that define the universe
Beer bubbles
Pouring ice - cold beer into a glass forms lots of flyspeck house of cards — and thanks to some thirsty scientist , now we know how many .
These scientist forecast that a half - pint glass of beer produces up to 2 million bubbles , about twice as many bubbles as Champagne score . But the researchers establish that the routine of bubble in a half - pint glass ranged from 200,000 to 2 million , according to their study , bring out in March in the journalACS Omega . It turns out that the number of bubbles count on three broker : the concentration of dissolvedcarbondioxide ( CO2 ) in the crank , the loudness of bubble and the point at which the CO2 depletes such that no more bubbles form . Also , tiny flaws in the glass would help bubbles issue from the liquid .
Read more : How many bubbles are in a crank of beer ?
Weight of SARS-CoV-2
If you were to get together all the speck of SARS - CoV-2 , the computer virus that make COVID-19 , go around around the globe into one space , the weight of the tiny , invisible mote would be somewhere between that of an apple and a young yearling , harmonize to a study published in June in the journalProceedings of the National Academy of Sciences . That calculation is ground on the appraisal that each infected individual carry about 10 billion to 100 billion SARS - CoV-2 particles at the peak of their infection . If there are between 1 million and 10 million infections at any give sentence , which has been the case during the class of thepandemic , the subatomic particle together would consider somewhere between 0.22 and 22 pound ( 0.1 and 10 kilograms ) .
" Here we are talking about a super - midget mass of virus , and they are all work mayhem on the domain , " the researchers told Live Science .
Read more : How much does all the SARS - CoV-2 in the world weigh ?
Elephants from space
Using planet and stilted intelligence , researchers counted Africanelephantsfrom outer space for the first time , according to a study put out online in Dec. 2020 in the journalRemote Sensing in Ecology and Conservation . The squad combined high - resolution images of Addo Elephant National Park in South Africa captured by satellites that orbit 372 mile ( 600 klick ) above Earth ’s surface . This novel proficiency can survey yard of international nautical mile in minutes , which is much fast than the distinctive way conservationists enumerate elephants in low - flying sheet , a cognitive process that can take hour . The researcher say this method could be vital for ascertain the survival of the African elephant ( Loxodonta africana ) , a metal money the International Union for Conservation of Nature classifies as endangered .
Read more : elephant counted from space using satellites and AI
Acceleration of a finger snap
Using gamy - speed camera and effect sensors , researcher picture out the fast acceleration of the human body : a snatch of the finger . Finger walkover generate maximum rotational speed of 7,800 degree per second and a maximal rotational acceleration of 1.6 million degrees per 2nd squared , according to a subject area write in November in theJournal of the Royal Society Interface . The acceleration of a finger’s breadth snap is three times the acceleration produced by a professional baseball musician ’s arm .
" When I first saw the data , I jumped out of my hot seat , " canvas fourth-year writer Saad Bhamla , an adjunct professor of chemical and biomolecular engineering at the Georgia Institute of Technology , read in a statement . “The finger snap occurs in only seven millisecond — more than 20 times fast than the blinking of an eye , which takes more than 150 msec . "
Read more : scientist find the fastest acceleration in the human body
Most precise pi ever
Piis one of the most famousirrational number , which intend it ca n’t be expressed as a common fraction and has an unnumberable number of digits after the decimal point . Researchers in Switzerland have now calculated the most accurate value of pi ever , up to 62.8 trillion denary place . Of naturally , the calculations , which took 108 sidereal day , were n’t done by hand but rather with a supercomputer . But do n’t get too comfortable with this accomplishment . Because pi is irrational , this criminal record can be broken over and over … forever .
Read more : Pi bet to a platter - breaking 62.8 trillion digits
Popularity of your friends
agree to the " friendly relationship paradox , " an musical theme that was first formulated in 1991 , your friends are typically more democratic than you are . But a group of mathematicians came up with a unexampled possibility that they say better account real - world friendships , according to a study published in May in theJournal of Complex Networks . " average are often extremely deceptive or at least can give out to report people ’s experiences , " head author George Cantwell , a postdoctoral chap at the Santa Fe Institute in New Mexico , previously told Live Science . " Some multitude are less popular than their friends ; others are more so . "
Their new equations show that the friendship paradox tend to be stronger in social internet made up of people with dissimilar level of popularity , such as a high school . If a soul has two acquaintance in the same social electronic connection as a somebody with 100 friends , in general , the friendly relationship paradox will be stronger than in a connection where the most societal individual has 10 friends and the least societal someone has three .
Read more : The ' friendly relationship paradox ' does n’t always explain literal friendly relationship , mathematician say
Black holes
How manyblack holesexist in the population ? These secret object are so dense that not even Inner Light escapes themt . astronomer ca n’t detect all the black holes out there , so they turned to theoretic calculation . In a subject field published in October the preprint databasearXiv , a group of researchers calculated that there might be zillion of small black holes in our cosmic neighborhood , or the most immediate surroundings around the sun , according to NASA . The prominent black holes , supermassive black hollow , are much rarer than the small ones ; each beetleweed unremarkably has only one . All in all , they count on that black holes hold about 1 % of all average matter ( not dark matter ) in the existence .
Read more : How many black holes are there in the creation ?
Walking around the moon
How long would it take to walk aroundthe moon ? The answer is n’t black - and - white ; rather , it depends on a issue of factors , include how tight you walk and how much time you spend walking each sidereal day . It also calculate on whether you take detours to fend off rough topography . At a supposititious walk amphetamine of up to 3.1 mph ( 5 km / h ) , which researcher antecedently calculate in a 2014 subject , it would take about 91 days to walk the 6,786 miles ( 10,921 kilometers ) around the lunation , Live Science account this year . But because it ’s not possible to take the air nonstop for 91 day , the journey would belike take much longer . It ’s more likely that a person would take the air a few hours a day . If a mortal walk at this speed for 4 hours a day , it would take about 547 Earth days , or about 1.5 years , to walk around the moon .
record more : How long would it take to walk around the moon ?
Satellites orbiting Earth
In another clause , Live Science explored the question of how many satellites presently orbit the planet . Since Russia launch Sputnik , the reality ’s first homo - made satellite , in 1957 , thousands of satellites have been lofted . About 10 to 60 were launched annually until the 2010s . Since then , the numbers racket have increased enormously : 1,300 raw satellites were place to low Earth orbit in 2020 and more than 1,400 in 2021 . As of September 2021 , there were around 7,500 dynamic satellites in low Earth orbit , Live Science report .
learn more : How many satellite orbit Earth ?
“Absolute limit” on the human life span
The " absolute limit " on the human spirit span may be 120 to 150 year , according to a study published in May in the journalNature Communications . A group of researchers calculated that limitation using a numerical model , which portend that after 120 to 150 long time , the body would recede its resilience , or the ability to recuperate from unwellness and injury . But if next therapies targeted and pass the physical structure ’s resilience , humans might be capable to survive longer , the researchers allege . The data for the study came from tumid data Set that hold aesculapian data for more than 500,000 people across the U.S. , the U.K. and Russia . The data include stemma tests in which the researchers specifically await for the ratio of two types of disease - contend lily-white blood cells .
Read more : Human life span may have an ' absolute limit ' of 150 years
in the first place published on Live Science .
