How do you work out how safe or dangerous a chemical or some other substance is? This week's Risk Bites takes a look at chemical safety, and estimating health risk from chemical exposure. This week's Risk Bites team: David Faulkner (post-production) Andrew Maynard (all the other stuff) Risk Bite
Derivative of sin(x), cos(x) product, product rule, chain rule, online math help Top calculator for school/university: http://amzn.to/2bkTSSC Top calculator online: http://www.wolframalpha.com/ Trigonometric functions (also called the circular functions) are functions of an angle. They relate the
Is our personality shaped by the environment or are we largely genetically programmed? No one can answer whether nature or upbringing leads to certain character traits in people. However, we know a lot about the influences of genes and environment when it comes to groups of certain populations - esp
Learn the basics about global warming as part of the environmental chemistry topic. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. JOIN our platform at www.fuseschool.org This video is part of 'Chemistry for All' - a C
If there is a suspicion of increased radiation exposure, there are various ways to determine it. One possibility is biological dosimetry, which can be used to estimate the level of individual radiation exposure. In the video, Dr. Ulrike Kulka explains how radiation exposure in humans can be biologic
View full lesson: http://ed.ted.com/lessons/what-would-happen-if-you-didn-t-sleep-claudia-aguirre In the United States, it’s estimated that 30 percent of adults and 66 percent of adolescents are regularly sleep-deprived. This isn’t just a minor inconvenience: staying awake can cause serious bodily
Explore how astronomers and scientists use astronomical units to measure distances in the solar system in this video adapted from NASA. The astronomical unit (au) -- equal to the average distance from Earth to the Sun -- is a convenient unit of measure when talking about distances in the solar syste
What is a Sievert, and why are they used to measure radiation exposure? Although we're exposed to ionizing radiation all the time, high levels can cause illness, disease, and even death. Yet working out how much radiation leads to specific health outcomes is complicated by the fact that different t
How do you know how likely something is to kill you? Or how do you work out how beneficial something is? Welcome to micromorts and microlives! Just how dangerous is crossing the road? And what's the real payback on eating healthily and exercising regularly? Neither are easy to get our heads aroun
When a plant or animal species that once lived stops existing entirely, we say that that species has become extinct. Why do certain species of plants and animals sometimes become extinct? According to the theory of evolution, individuals of the same species show a range of variations. Some individ
Plants are extremely complex and diverse - there are thousands of species. In fact, there are probably somewhere around half a million different species. And these are just the ones we know about - there are no doubt many more that haven’t been fully discovered yet! It is estimated that 1 in 5, so
In this video we are going to cover eating disorders, and in particular, anorexia. You may not be aware of this, but four out of 10 people have either personally experienced an eating disorder or know somebody who has. So what exactly is an eating disorder, you may ask? An eating disorder is a psy
