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
Each year an estimated 200,000 to 300,000 people die from schistosomiasis. This is why the World Health Organization (WHO) has stepped up the fight against the tropical disease transferred by parasites. Also fighting on the front line: Dr. Lester Chitsulo. He is energetically coordinating the worldw
Paleontologists estimate that around 380 million years ago, there were fish with pectoral fins that already had finger-like bones. And from those, the limbs of vertebrates evolved. The skeleton of these limbs follows the same basic blueprint: Authors: ZDF/3sat/Marco Polo Film AG/Herbert Ostwald/Hol
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
At the height of his power, Pablo Escobar was estimated to be worth around $30 billion in today's money. That number is very difficult to visualize however, and the goal of this video is to explore just how completely absurd and unreal making $22 billion a year selling cocaine really is. Click here
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 If There Were No Seasons? The Earth experiences seasons because of the tilt of its axis. The Earth has a tilt because an object that is estimated to be the size of Mars collided with the Earth around 4.5 billion years ago. A chunk was knocked off, and ended up becoming our moon, which actually
Click here to see more videos: https://alugha.com/LifesBiggestQuestions Our earth is really old. Estimates put the age of our earth at 4.5 billion years. For 1.5 billion years, it was desolate, no life existed. But Somewhere around 3 billion years ago, life began to sprout on planet earth. Scientis
