Posted on July 21, by The Physicist Physicist: When things die they stop getting new carbon and the carbon they have is free to radioactively decay without getting replaced. Carbon has a half-life of about 5, years, so if you find a body with half the carbon of a living body, then that somebody would have been pretty impressed by bronze. Of course none of that helps when it comes to pottery and tools except wooden tools. Generally speaking, archaeologists make the assumption that if the grains in and around of a clay pot are, say, 8, years old, then the pot itself is roughly the same age. If you had an ancient amphora sitting around, would you use it for fresh strawberry preserves? And before you answer:
Differential Equations : Radioactive Decay
Wednesday, February 13, Absolute Value Foldables and a 3-Hole Punch Story [If you’re not interested in absolute value, there is a pretty funny story about a 3-hole punch at the very end. Or, maybe it’s not funny. Either way, it was a memorable experience.
Write an equation relating N(t) and N(t+1), that is to say, the amount of radioactive atoms at some time t and after exaclty one half life. This is called a functional equation as the unknown is the function N itself.
Pocket I was a wayward kid who grew up on the literary side of life, treating math and science as if they were pustules from the plague. One day, one of my students asked me how I did it—how I changed my brain. I wanted to answer Hell—with lots of difficulty! Learning math and then science as an adult gave me passage into the empowering world of engineering.
Fortunately, my doctoral training in systems engineering—tying together the big picture of different STEM Science, Technology, Engineering, Math disciplines—and then my later research and writing focusing on how humans think have helped me make sense of recent advances in neuroscience and cognitive psychology related to learning. In the years since I received my doctorate, thousands of students have swept through my classrooms—students who have been reared in elementary school and high school to believe that understanding math through active discussion is the talisman of learning.
George I got one for you: The first day, the newly elected class president announces that at the start of class The latest wave in educational reform in mathematics involves the Common Core—an attempt to set strong, uniform standards across the U. At least superficially, the standards seem to show a sensible perspective. They propose that in mathematics, students should gain equal facility in conceptual understanding, procedural skills and fluency, and application. The devil, of course, lies in the details of implementation.
In the current educational climate, memorization and repetition in the STEM disciplines as opposed to in the study of language or music , are often seen as demeaning and a waste of time for students and teachers alike.
Carbon 14 Dating
Potential of abundant, environmentally harmless energy technology , which already exists My strategy for manifesting that energy event for humanity’s and the planet’s benefit. I w as born in In that same year, I had my cultural and mystical awakenings.
Planning Process Campus Announcement February 5, at If your daughter is recruited by Stanford, she should go. If she desires to go to ASU, she should go, and not wait for someone else to ask. She determines her future, not college recruiters. And btw, we are all ELL in this country. Nothing special about it. He is a good teacher, created the MPA program and works hard. That’s a great incentive, and a great tool for recruiting new faculty – the opportunity is here.
Make something of it, and of yourself.
History of mathematics
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. With some quick math, the rule provides a minimum and maximum partner age based on your actual age that, if you choose to follow it, you can use to guide your dating decisions. But how legitimate is this rule?
Does it match our scientific understanding of age-related preferences for 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.
Follow A maths exam question for high school students about a 50 cent piece has created a debate online after complaints it was too difficult. Australian students sat the VCE Further Maths exam which posed the controversial question on November 30 and now adults are having a go at answering it online. Not this 50 Cent"A 50 cent coin has 12 sides of equal length. Two 50 cent coins are balanced next to each other on a table so they meet along one edge,” the question reads.
Students were then asked to work out the degree of the angle between the coins and given multiple choice options ranging from 12 to 72 degrees. Scroll down for the answer. I think I was overthinking it. Stop your whinging kids! Overthinking did them in,” wrote another. Graeme Newman, a teacher in Victoria, told The Age he believed the maths exam was fair but suggested why some students may have struggled with the 50 cent piece question.
Exam questions that divided the internet Hannah’s Sweets When is Cheryl’s birthday? The answer Step 1: Multiply the 6 by the 5 and the n by the n Multiply the top-left by bottom-right and top-right by bottom-left Step 4:
Does It Matter That My Boyfriend Is Twice My Age
How David beats Goliath I remember this article. It is about high school girls basketball. I think lots of youth sports balances sub-optimal playing with actually playing something resembling the sport. I know in my early youth leagues, playing defense in the back court was just declared against the rules of the league, because otherwise we would just never learn how to play actual basketball. He began calling one foul after another.
The memory was painful.
Cuckolding is bound to take on a new form over the next two decades. Many women will gladly take some (or a lot of) money on the side to have sex with a rich, usually older the same time, expect them to maintain a"relationship” with a man closer to their own financial level.
Carbon Dating Carbon dating to determine the age of fossil remains In this section we will explore the use of carbon dating to determine the age of fossil remains. Carbon is a key element in biologically important molecules. During the lifetime of an organism, carbon is brought into the cell from the environment in the form of either carbon dioxide or carbon-based food molecules such as glucose; then used to build biologically important molecules such as sugars, proteins, fats, and nucleic acids.
These molecules are subsequently incorporated into the cells and tissues that make up living things. Therefore, organisms from a single-celled bacteria to the largest of the dinosaurs leave behind carbon-based remains. Carbon dating is based upon the decay of 14C, a radioactive isotope of carbon with a relatively long half-life years. While 12C is the most abundant carbon isotope, there is a close to constant ratio of 12C to 14C in the environment, and hence in the molecules, cells, and tissues of living organisms.
This constant ratio is maintained until the death of an organism, when 14C stops being replenished. At this point, the overall amount of 14C in the organism begins to decay exponentially. Therefore, by knowing the amount of 14C in fossil remains, you can determine how long ago an organism died by examining the departure of the observed 12C to 14C ratio from the expected ratio for a living organism.
> misc > determine the optimum age for your next girlfriend, mistress, or wife
The underlying question is why Euclid did not use this proof, but invented another. One conjecture is that the proof by similar triangles involved a theory of proportions, a topic not discussed until later in the Elements, and that the theory of proportions needed further development at that time. The large square is divided into a left and right rectangle. A triangle is constructed that has half the area of the left rectangle.
1 The median score for college-bound seniors on the math section of the SAT in is about out of So right there is proof that there are lots of unsolved math problems. 2 The great 19th-century mathematician Carl Friedrich Gauss called his field"the queen of sciences.” 3 If math is a.
This is great stuff on Prenups. I have no intention of going into Family Law, but I think maybe we can combine efforts and create an article on Prenups. Not legal advice, of course, but a crash-course on Prenups. I already started on the article for RoK on prenups, but you seem knowledgeable on the topic and maybe we can combine efforts? Are you an attorney? Modern marriage Marriage 2. I used to be a proponent of marriage in the past, because of my Christian faith, but also because I was successfully married for over 12 years, until became widower.
But when asked if I would marry again today, my answer is unequivocal: I consider myself a real Christian, and I would love to be able to get married again and to have children, but in America, that is simply NOT feasible. The risks are insanely high for me, I only have to lose if I marry again. It helps and if the man is dead-set on marriage, he absolutely should have a Prenup drafted by a specialist lawyer, but he needs to understand it is a false sense of security.
The Prenup can be thrown out by an Emperor for any reason or cannot protect the man in the future. Let me know if you want to collaborate.
Personal Finance and Dating
How strange things happen when we start to manipulate divergent series. Investigate what makes a number happy or sad, or sociable! Can you find the loop of infinite sadness?
Happy Birthday. About old people becoming more conservative, isn’t it more that they stay in place as society becomes more liberal? had an article on how judges become more liberal as they age, for example. Although interestingly, one of the theories they suggest to explain this is social pressure from their press/society.
Always consult a competent professional for answers specific to your questions and circumstances. Weight-Loss Equation Gets a Makeover Almost every diet book, nutrition guide and weight-loss manual includes the information that one pound of body weight equals 3, calories… and then comes the advice that for every pound that you want to lose, you must either eat 3, fewer calories or use up that amount with extra physical activity.
If you reduce your average daily caloric intake by calories one less snack pack per day, perhaps? This would add up to almost The problem with the 3, calorie formula, said Dr. Hall, is that it is predicated on the idea that metabolism remains constant — and it does not. Metabolism is affected by gender, by age, by size and weight loss, and by stress and lifestyle. So What Can You Do? The point at which this occurs is both highly individualized and affected by the changes in body composition.
Hall noted that the 3, calorie formula grossly overestimates how much weight will be lost in a year even for that population.
Such concepts would have been part of everyday life in hunter-gatherer societies. The idea of the"number” concept evolving gradually over time is supported by the existence of languages which preserve the distinction between"one”,"two”, and"many”, but not of numbers larger than two. For example, paleontologists have discovered in a cave in South Africa , ochre rocks about 70, years old, adorned with scratched geometric patterns.
Moreover, hunters and herders employed the concepts of one, two, and many, as well as the idea of none or zero, when considering herds of animals. One common interpretation is that the bone is the earliest known demonstration  of sequences of prime numbers and of Ancient Egyptian multiplication. The Ishango bone consists of a series of tally marks carved in three columns running the length of the bone.
The Nora Ephron Theorem of Soulmates: Through this theorem, x will spend her lifetime alone because y is an imaginary expectation of perfection and absolute satisfaction embodied in a human as demonstrated by the CW network and it will never exist, let alone come to New York to save x from herself. In this case, 24x is divided by the number of males that x has encountered within the age span, keeping in mind the exception to this rule, The Billy Loomis factor.
Following the logical schematic exclusions of social interaction with males who plot to murder x in a Freudian revenge model like Billy Loomis in Scream , we must subtract the sum total of the Billy Loomis Factor from overall male-interactions, i. When this is complete, we can divide using the new value of males. Cannot divide by zero. This equation can be graphed thusly: As evidenced by the graph, x is approaching her limit.
This theorem can be employed if and only if the limit of the Stress-Suffering-Sorrow Congruence limit is adjusted for a higher volume of s3, and, as evidenced by Fig. If x has an attractiveness to the second power while the greater population has moderate attractiveness, the converse informs a negative soulmate result. Mathematically, this is bullshit.
Within P new york , the factor x is too insubstantial a value against the models variable for the Too Much Beauty Converse to apply.