Play media By placing a metal bar in a container with water on a scale, the bar displaces as much water as its own volume , increasing its mass and weighing down the scale. The most widely known anecdote about Archimedes tells of how he invented a method for determining the volume of an object with an irregular shape. According to Vitruvius , a votive crown for a temple had been made for King Hiero II of Syracuse , who had supplied the pure gold to be used, and Archimedes was asked to determine whether some silver had been substituted by the dishonest goldsmith. While taking a bath, he noticed that the level of the water in the tub rose as he got in, and realized that this effect could be used to determine the volume of the crown. For practical purposes water is incompressible,  so the submerged crown would displace an amount of water equal to its own volume. By dividing the mass of the crown by the volume of water displaced, the density of the crown could be obtained.
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Share Tweet Advertisement The online dating website OkCupid, first developed and launched back in by Harvard students, was hacked by the clever mathematician Christopher McKinlay. He did not do anything to cause harm to anyone including the website. He rather used a smart reverse-engineering algorithm to sort out the women who best matched his interests.
The story of McKinlay who has a PhD in mathematics is quite unique.
TED Talk Subtitles and Transcript: Finding the right mate is no cakewalk — but is it even mathematically likely? In a charming talk, mathematician Hannah Fry shows patterns in how we look for love, and gives her top three tips (verified by math!) for finding that special someone.
From failures in math, funny jokes, cool facts, puzzles, comics… Updated Mon-Fri! The problem with dating a mathematician Posted by Maiu on November 19, Should you date a mathematician? This is the question Tanya Khovanova asked herself on her blog. The list of bad features also includes professions to avoid. Can you guess the first profession on the list?
OK, I think you should be able to meta-guess given the fact that I am writing about it. Indeed, the list on page 64 starts: Avoid, on the whole, mathematicians… I am an expert on NOT avoiding mathematicians: First, there are many mathematicians who, like my first husband, are very devoted to mathematics. I admire that devotion, but it means that they plan to do mathematics on Saturday nights and prefer to spend vacation at their desks.
If they can only fit in one music concert per year, it is not enough for me. Of course, this applies to anyone who is obsessed by his work. Second, there are mathematicians who believe that they are very smart. Smarter than many other people.
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That’s because women generally message men who are five points more attractive as rated by OKCupid users than they are, while they typically receive messages from men who are seven points less attractive than they are. At the same time, OKCupid found that men currently send 3. Here’s how it works: Fry uses the example of three boys talking to three girls at a party. Each participant has an ordered list of who is most suitable to go home with.
The Mathematics of Love If this was a s-style dating scenario in which the boys approached the girls, each boy would hit on his top-choice girl, Fry says.
OkCupid is the only dating app that knows you’re more substance than just a selfie—and it’s free! Download it today to make meaningful connections with real people. OkCupid is the only dating app that knows you’re more substance than just a selfie—and it’s free! Download it today to make meaningful connections with real people.
About a Boston mass whiz who hacked his way to true love and figured out how to get the girl of his dreams. It’s a little more of “Beautiful mind. Chris Mckinley is so fed up with online dating he rye sorted to math to find his true love. I probably went on maybe a date or two a month for four or five months.
Frustrated but still hopeful Mckinley says he built his own algorithm to attract the best matches from the dating site he was on, okaycupid. This was very much grad student geek mode. He wrote a book entitled “Optimal cupid” says he set up six fake profiles and used them to get information from about 20, women on a site. So there were seven clusters of people all of whose answers were similar.
From those clusters of women he studied how they answered key survey questions from the site including their interests and what they were looking for in a man. He says all of a sudden he had thousands of potential matches who put him at the top of their Li list. How many dates did you go on.
Mathematician dating site The best dating website? I 25f was in a relationship with a math postdoc 31m, probability was his forte who was in a 6 year relationship with his ex 29f, she was pursuing her phd in psychology prior to meeting me. What to know about iphone battery replacements.
The Great Pyramid of Giza (also known as the Pyramid of Khufu or the Pyramid of Cheops) is the oldest and largest of the three pyramids in the Giza pyramid complex bordering what is now El Giza, is the oldest of the Seven Wonders of the Ancient World, and the only one to remain largely intact.. Based on a mark in an interior chamber naming the work gang and a reference to the fourth.
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The most simple way to define dating is through a mathematical equations. A date consists of two people making plans to go out to a public place over dinner or drinks with the intent to get to know one another better not just to get laid. And yes, you can date multiple people at one time.
Mathematicians seek truth, beauty and elegance, in mathematics itself and in our work with researchers studying fundamental questions in a host of other disciplines. We pursue excellence in all aspects of research, teaching and the communication of mathematics.
English, German, Francais, Espanol, Italian, Portuguese Mathematics is a powerful calculation software for your android smartphone. The natural display shows fractions, roots and exponents as you would expect it from mathematics. In a few seconds you derivate or integrate your desired function, calculate the zero points of your function und show them in the function plot.
See all maxima, minima or inflection points in one view. The easy way of use allows you to solve linear equations in just a moment. Or transform your mathematical, physical or chemical equation to any unknown variable. You often needs to calculate with binary, octal or hexadecimal number systems? You can mix them together in one calculation even by using decimal digits.
But that’s not enough! You can also calculate with any other number system with base 2 to
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Home Articles The maths of online dating The maths of online dating You might not think that finding your true love and mathematics have much in common, however increasingly you would be wrong. Just like the fact that more people are shopping online every year, more people are also dating online. This means that online dating is big business and consequently the sites that are best at helping people to meet their future partners are going to succeed in the market. This means that online dating sites need to have the best method for matching people and this is where the mathematics comes in.
It is thought that the Egyptians introduced the earliest fully-developed base 10 numeration system at least as early as BCE and probably much early. Written numbers used a stroke for units, a heel-bone symbol for tens, a coil of rope for hundreds and a lotus plant for thousands, as well as other hieroglyphic symbols for higher powers of ten up to a million. However, there was no concept of place value, so larger numbers were rather unwieldy although a million required just one character, a million minus one required fifty-four characters.
Ancient Egyptian method of multiplication The Rhind Papyrus, dating from around BCE, is a kind of instruction manual in arithmetic and geometry, and it gives us explicit demonstrations of how multiplication and division was carried out at that time. It also contains evidence of other mathematical knowledge, including unit fractions, composite and prime numbers, arithmetic, geometric and harmonic means, and how to solve first order linear equations as well as arithmetic and geometric series.
The Berlin Papyrus, which dates from around BCE, shows that ancient Egyptians could solve second-order algebraic quadratic equations.
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Watch video · The story of a team of female African-American mathematicians who served a vital role in NASA during the early years of the U.S. space program.
History and description Timeline and map of the Great Pyramid of Giza and the other Wonders of the Ancient World Egyptologists believe the pyramid was built as a tomb for the Fourth Dynasty Egyptian pharaoh Khufu often Hellenized as “Cheops” and was constructed over a year period. Khufu’s vizier , Hemiunu also called Hemon is believed by some to be the architect of the Great Pyramid.
The mass of the pyramid is estimated at 5. Additionally, since it consists of an estimated 2. The first precision measurements of the pyramid were made by Egyptologist Sir Flinders Petrie in —82 and published as The Pyramids and Temples of Gizeh. Many of the casing-stones and inner chamber blocks of the Great Pyramid fit together with extremely high precision. Based on measurements taken on the north-eastern casing stones, the mean opening of the joints is only 0.
Some Egyptologists consider this to have been the result of deliberate design proportion. They believe that the observed pyramid slope may be based on a simple seked slope choice alone, with no regard to the overall size and proportions of the finished building. The Tura limestone used for the casing was quarried across the river. Traditionally,[ clarification needed ] ancient Egyptians cut stone blocks by hammering into them wooden wedges, which were then soaked with water.
Tanya Khovanova’s Math Blog
The US cover Hello World is finally almost here! Cambridge Analytica might have made the headlines recently, but these algorithms are everywhere. In our hospitals, our courtrooms, our police stations and our supermarkets. This is a book that takes stock of where we are now, and where we are headed in the not-to-distant future.
Dr Hannah Fry is an Associate Professor in the Mathematics of Cities at the Centre for Advanced Spatial Analysis at UCL. She works alongside a unique mix of physicists, mathematicians, computer scientists, architects and geographers to study the patterns in human behaviour – particularly in an urban setting.
Fry is a something Brit, a mathematician and a complexity theorist who studies the connections between mathematics and human interaction at University College London. You can find her online giving TED talks in which she presents mathematical analysis of her favorite subjects: On-screen and on the page, Fry has a wry, chatty voice that illuminates age-old questions in brainy yet simple language.
She summarizes tricky formulas but gladly admits that, when things get too gnarly for the general reader, she will provide only an abbreviated explanation of, say, optimal stopping theory, as this footnote reveals: She contends that long-held assumptions about beauty are based on some faulty math and science, which is good news for those who may not be gorgeous enough for the runway — that is, the majority of us.
And how do you do this to a degree of accuracy of five or more decimal places in your golden ratio measurement? But knowing this, we can exploit mathematical formulas for luring the opposite sex or the same sex, as the case may be. Standing out — even for unattractive physical characteristics — can be just as important. Fry uses an analysis from the dating site OkCupid, co-founded by mathematician Christian Rudder, that draws on a technique known as regression analysis.
OkCupid looked at the number of messages people received based on how others measured their attractiveness. People who were rated less attractive got more messages than people who were considered quite attractive but not amazingly beautiful. The algorithm suggests that people who make advances are much better at getting a desired partner than those who sit back and wait for someone to come to them.