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Radioactive decay[ edit ] Example of a radioactive decay chain from lead Pb to lead Pb. The final decay product, lead Pb , is stable and can no longer undergo spontaneous radioactive decay. All ordinary matter is made up of combinations of chemical elements , each with its own atomic number , indicating the number of protons in the atomic nucleus. Additionally, elements may exist in different isotopes , with each isotope of an element differing in the number of neutrons in the nucleus. A particular isotope of a particular element is called a nuclide. Some nuclides are inherently unstable. That is, at some point in time, an atom of such a nuclide will undergo radioactive decay and spontaneously transform into a different nuclide.

## The mathematical formula for love

Student View Task Carbon 14 is a common form of carbon which decays over time. The half-life of Carbon 14, that is the amount of time it takes for half of the Carbon 14 to decay, is approximately years. If there is currently one microgram of Carbon 14 remaining in the preserved plant, approximately when did the plant die?

Jan 31, · Minimum age formula Posted: 1/30/ PM age is a state of mind I believe – not a formula. I have met some really immature 50 year old men and women and some bright mature 25 .

Exponential Decay Natasha Glydon Exponential decay is a particular form of a very rapid decrease in some quantity. One specific example of exponential decay is purified kerosene, used for jet fuel. The kerosene is purified by removing pollutants, using a clay filter. If Po is the initial amount of pollutants in the kerosene, then the amount left, P, after n feet of pipe can be represented by the following equation: This means that we need a pipe that is Carbon 14 Dating Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material.

The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles. Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon. At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues. When an organism dies it ceases to replenish carbon in its tissues and the decay of carbon 14 to nitrogen 14 changes the ratio of carbon 12 to carbon

## Pagadian City Beach Attractions

This rules states that by dividing your own age by two and then adding seven you can find the socially-acceptable minimum age of anyone you want to date. Take your age, subtract 7, and double it. So for a year old, the upper age limit would be 34 i.

Webcomic xkcd confirms my earlier post as to this formula. (Second link goes to discussion later on in the thread.) An important caveat that usually doesn’t need mentioning in places that aren’t the internet: Dating girls under the legal age of consent is creepy regardless of the math.

Let’s start with general definitions. Mathematics is made of 50 percent formulas, 50 percent proofs, and 50 percent imagination. American coffee is good for lemmas. An engineer thinks that his equations are an approximation to reality. A physicist thinks reality is an approximation to his equations. A mathematician doesn’t care. Old mathematicians never die; they just lose some of their functions. Mathematicians are like Frenchmen: Poincare What is a rigorous definition of rigor?

I do not think — therefore I am not. Here is the illustration of this principle:

## welcome to coolmath

Age and the Standard Creepiness Rule The graph isn’t exactly going to win artistic awards The Standard Creepiness Rule states that if we define an individual’s age as x, said individual should not date anyone under: However does not take into account either the population of each age bracket something which would require individual research , nor the percentage of those who are single in each age bracket. It has been suggested however that graphing these equations will help boost your self-esteem, and generally give you something nice to put on your wall.

The Drake Equation A commonly noted problem however is that environmental factors often decrease the ability of individuals to find someone with mutual interest; so that despite the fact that the estimated dating pool only increases with age, the experienced dating pool seems to be much smaller.

This work is licensed under a Creative Commons Attribution-NonCommercial License. This means you’re free to copy and share these comics (but not to sell them). More details.

Summary[ edit ] DescriptionHalf-age-plus-seven-relationship-rule. According to this rule, the age of the younger person should not be less than half the age of the older person plus seven years, so that for example no one older than 65 should be in a relationship with anyone younger than 39 and a half, no one older than 22 should be in a relationship with anyone younger than 18, and no one under 14 years of age should be in a relationship at all From another point of view, the chart can be interpreted as saying that there should not be an age disparity of as much as five years unless the younger person has an age of 19 or more, a ten-year disparity should exist only if the younger person has an age of 24 or more, and a twenty-year disparity should occur only if the younger person has an age of 34 or more.

And people only slightly older than 14 should only be involved with those almost exactly the same age as themselves. To read the chart, go to the position along the x-axis which corresponds to your age, and the green range between the black and red lines directly above that position corresponds to the range of your partner’s ages which is deemed acceptable by the rule. The area between the blue and red lines shows where you are the older partner in the half-age-plus-seven calculation, while the area between the black and blue lines shows where you are the younger partner.

Hugh Herbert , it’s stated or implied that at the beginning of a relationship or marriage, the woman’s age “is supposed to be half the man’s age, plus seven”, which gives a different asymmetrical interpretation to the rule. Similarly, in his autobiography, George Arnold Escher , father of famous artist M. Escher claimed that when he was looking for a wife ca.

## Calculate Age in Excel using Various Formulas Including DATEDIF

MathScore EduFighter is one of the best math games on the Internet today. You can start playing for free! References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance.

Answers to these sample questions appear at the bottom of the page.

We can use a formula for carbon 14 dating to find the answer. Where t 1/2 is the half-life of the isotope carbon 14, t is the age of the fossil (or the date of death) and ln() is the natural logarithm function.

At first glance this seems like a rather stupid question. The best estimate of the half-life of Carbon is years. Thus problems in calculus books read like number 11 on page of Calculus, Concepts and Contexts by James Stewart. Scientists can determine the age of ancient objects by a method called radiocarbon dating. The bombardment of the upper atmosphere by cosmic rays converts nitrogen to a radioactive isotope of carbon, 14C, with a half-life of about years.

Vegetation absorbs carbon dioxide through the atmosphere and animal life assimilates 14C through food chains. When a plant or animal dies it stops replacing its carbon and the amount of 14C begins to decrease through radioactive decay. Therefore, the level of radioactivity must also decay exponentially. Estimate the age of the parchment. The half-life of 14C is years, so. Then the desired answer is the solution of the equation. There is only one thing wrong with using years as the half-life of 14C: In the s and early s thousands of dates were published which were based on a half-life of 14C of years sometimes rounded to years.

At one time this was considered the best estimate of the half-life of 14C, but continued improvement in measurements eventually showed years was better.

## welcome to coolmath

Brad I found an interesting article that proposes a math equation for suggesting the age of people you should be willing to date. I really thought it worked well at the lower age ranges but in the 40s things started to get a little excessive first for the upper limit and then later for the lower limit as well. For example, my dad happens to be 57 years old. The equation given would suggest that his optimal dating range would be between

Nov 12, · Socially acceptable dating age ratio formula?? or disagree? Page 1 of 2 (1, 2): Someone once told me that there was a socially acceptable formula .

These are external links and will open in a new window Close share panel Image copyright Thinkstock Looking for the ideal partner? Wondering if your relationship will last? They’re common questions as Valentine’s Day approaches – so how do you find the right person and keep them? Hannah Fry, author of The Mathematics of Love, says three things make the magic formula. Play up to whatever makes you different Anyone who’s ever joined a dating website will know the hours of agony picking your perfect profile picture – the one where you had perfect hair, glowing skin and a winning smile.

Well, you needn’t have bothered. Because being easy on the eye won’t give you an easy pass to online success. Instead, having people think you are unattractive can actually work to your advantage. It may seem counter intuitive, but it’s been proven by statistics. Christian Rudder, a mathematician and co-founder of online dating website OKCupid has spent a decade collecting and analysing data from people who use his site. In one section you can rate how attractive other people are on a scale between 1 and 5.

To test how attractiveness might link to popularity, Rudder and his team took a random selection of 5, female users and compared the average attractiveness scores they each received with the number of messages they were sent in a month. You’d think attractiveness would be a pretty good indicator of how popular they’d be. But instead the OKCupid team discovered it was the spread of scores that mattered.

## 20 Things You Didn’t Know About… Math

You need to stand out. Usually, that means herself. This also shows that you took the time to actually read her profile which is a step a lot of lazy guys skip.

A common rule of thumb, at least on the internet, is that it’s okay to be interested in someone “half your age plus seven” years. According to this rule, it would not be creepy for a 30 year old to date a 22 year-old, but an 18 year-old would be off-limits.

Filed under Pagadian City The Philippines, being a country archipelago of islands and seas, have naturally wonderful beaches, some of which are famous the world over. Beaches like Puerto Galera, Boracay, and the various beaches in Cebu rake in tourists from around the world all year round because of their pristine and cool blue waters and fine, white-sand shores.

However, if one will just look around more, they will find that there are other less-known but equally beautiful beach spots in other parts of the Philippines. In Pagadian, in particular, there are beaches and islands that will make one believe that there is such a thing as a secluded paradise on Earth. A nice place to start would be the Dao-Dao Islands some seven to ten minutes away from the seaport, when riding a motorboat.

It is a rather big island, with an area size of about 1. The coral reefs are artificially made, but the whole place is very much ideal for swimming, fishing, and boating. During low tides, a smaller, more undeveloped island appears and like the rest, is also suitable for fishing and swimming. There is also the White Beach that, as its name suggests, is a stretch of white sand beach just minutes southeast of the seaport. Again, it can be reached via motorboat.

## Free Calculators and Converters

Are British men really less inclined to cheat? It starts in that sweet spot between intimacy and excitement which is impossible to manufacture and tiring to maintain. Can the algorithms of online dating sites or indeed the long odds of stumbling upon your perfect partner down the local pub ever predict where, when or for how long cupid will strike?

Whilst science has not yet manufactured the perfect partner, mathematicians are claiming to have found the formula that predicts how long love will last. Research commissioned by MSN has revealed a new love equation that determines the key ingredients to a successful, long-lasting relationship — with factors such as a good sense of humour ranking in importance alongside a person’s number of previous sexual partners.

Kezia noble teacher got in love dating math formula rightish and, plus 7 is appropriate for the acceptable age a formula e mc2 for. I could date under 30, so he computes half-your-age-plus-seven rule in .

Whatsapp A plucky amateur dared to question a celebrated psychological finding. He wound up blowing the whole theory wide open. It was autumn of So then what was this? The theory was well credentialed. But Brown smelled bullshit. A universal constant predicting success and fulfillment, failure and discontent? After nearly twenty years in the position, stretched thin between technical duties and managerial headaches, he was looking for something new. Still operating in a large bureaucracy—the same organization, in fact—Brown was now tasked with promoting staff welfare.

He was fed up. Then one day in November , Brown happened to find himself at a Manchester conference attending a talk by popular British psychologist Richard Wiseman, who had written a book called The Luck Factor.