Illustration: Rhett Allain You can see that we have a right triangle with the hypotenuse equal to the distance from the observer’s eyes to the center of the Earth (R + h), with the other two sides being just R and the distance to the horizon (s). Using the Pythagorean theorem, we can solve for … Read more
Littorina snails are common on the rocky shores of Europe, the U.K., and the East Coast of the U.S. Credit: Daria Shipilina Significant evolutionary changes happen gradually as opposed to in dramatic “monster” steps, biologists have discovered, answering the long-debated question as to how game-changing innovations like flight, vision, and the bearing of live offspring … Read more
Polymers with breakable bonds inserted into the polymer chains (B) were more easily degraded and re-formed than those with breakable bonds in the cross-lnks (A). Credit: Maciek Kopec A team of UK scientists has got a step closer to making several different types of plastic much easier to recycle using a method that could be … Read more
Not only do I get the “shape” of the acceleration curve for the colliding cart, but I also get a maximum acceleration of –6.67 meters per second squared. With that acceleration and the mass of the cart (0.566 kilogram), we get a maximum impact force of 3.73 newtons. This isn’t quite the same value I … Read more