Penny battery - Wikipedia, the free encyclopedia - Nightly The penny battery is a voltaic pile which uses various coinage as the metal disks of a traditional voltaic pile. The coins are stacked with pieces of electrolyte soaked paper in between (see diagram at right). The penny battery experiment is often during electrochemistry units in an educational setting. Coinage selection Building a penny battery A penny battery can be useful in producing a small amount of volts. If the LED is not lighting up or if the voltmeter is not registering any electricity then a few problems could have occurred during set up. Energy Batteries convert the chemical energy of the two metals (electrodes) interacting with the acid on the matboard (electrolyte) into electrical energy. References
Keshia Thomas Shields a Racist From Harm - Nightly In 1996, something pretty amazing happened in Ann Arbor. Maybe you remember, maybe you don’t. But it basically went something like this. Seventeen Knights of the Ku Klux Klan, most of them hooded, rallied on the second floor of City Hall. Meanwhile, just outside there were 300 anti-KKK protesters in the street – obviously angry and unhappy to say the least. That’s when one of them spotted a man nearby wearing a Confederate flag shirt, watching the protest. That’s when things went from violent to a kind of heroism I’ve never seen before: The man is seen running from the protesters in this gripping photo. Mark William Brunner The mob caught up to him, surrounded him, and proceeded to kick him and beat him. That’s when Keshia had enough. She covered his body with her own, screaming for the mob to stop the violence. They listened and, in tears, she held the racist man in her arms. This is the photo that the whole world was talking about in 1996. Everyone needs to be a little more like Keshia.
Galvanic cell - Wikipedia, the free encyclopedia - Nightly A galvanic cell, or voltaic cell, named after Luigi Galvani, or Alessandro Volta respectively, is an electrochemical cell that derives electrical energy from spontaneous redox reactions taking place within the cell. It generally consists of two different metals connected by a salt bridge, or individual half-cells separated by a porous membrane. History In 1780, Luigi Galvani discovered that when two different metals (e.g., copper and zinc) are connected and then both touched at the same time to two different parts of a nerve of a frog leg, then the leg contracts. He called this "animal electricity". The voltaic pile, invented by Alessandro Volta in the 1800s, consists of a pile of cells similar to the galvanic cell. It was suggested by Wilhelm König in 1940 that the object known as the Baghdad battery might represent galvanic cell technology from ancient Parthia. Description Schematic of Zn-Cu galvanic cell Mn+ (oxidized species) + ne- M (reduced species) An+ + ne- Bm+ + me-
Uncle Scott, a Man with Down Syndrome, Received Unbelievable Kindness From Strangers - Nightly This is Scott. He was dying of liver disease and was not expected to make it much longer. He also had Down Syndrome. His nephew decided to post a little bit about him online – some of his interests and what he enjoys doing – not for pity or sympathy, but just to let the world know about his incredible uncle and what he was going through. And that’s when literally thousands of people from all around the world decided to make the end of Scott’s life something very, very special. Scott used to love writing. What strangers did for him brought out the happiness inside of him, no matter how sick he got. He was sent literal piles of mail from people who wanted to show how much he was loved. His grandmother helped him go through some of the letters. Users on Reddit.com sent him these to keep him happy while his health was failing. Scott received letters, but also gifts from companies. Strangers spent hours creating gifts for Scott, like this painting. He loved it! He was always a bit camera shy… Source
How Car Engines Work" - Nightly Have you ever opened the hood of your car and wondered what was going on in there? A car engine can look like a big confusing jumble of metal, tubes and wires to the uninitiated. You might want to know what's going on simply out of curiosity. Or perhaps you are buying a new car, and you hear things like "3.0 liter V-6" and "dual overhead cams" and "tuned port fuel injection." In this article, we'll discuss the basic idea behind an engine and then go into detail about how all the pieces fit together, what can go wrong and how to increase performance. The purpose of a gasoline car engine is to convert gasoline into motion so that your car can move. Two things to note: There are different kinds of internal combustion engines. Let's look at the internal combustion process in more detail in the next section.
35 Lifechanging Ways To Use Everyday Objects - Nightly Simpson's rule - Wikipedia, the free encyclopedia - Nightly Simpson's rule can be derived by approximating the integrand f (x) (in blue) by the quadratic interpolant P(x) (in red). In numerical analysis, Simpson's rule is a method for numerical integration, the numerical approximation of definite integrals. Specifically, it is the following approximation: Simpson's rule also corresponds to the three-point Newton-Cotes quadrature rule. The method is credited to the mathematician Thomas Simpson (1710–1761) of Leicestershire, England. Simpson's rule is a staple of scientific data analysis and engineering. Derivation Simpson's rule can be derived in various ways. Quadratic interpolation One derivation replaces the integrand by the quadratic polynomial (i.e. parabola) which takes the same values as at the end points a and b and the midpoint m = (a + b) / 2. An easy (albeit tedious) calculation shows that This calculation can be carried out more easily if one first observes that (by scaling) there is no loss of generality in assuming that and . where
Strollin' downtown, haters gonna hate - Imgur - Nightly Ship of Theseus - Wikipedia, the free encyclopedia - Nightly The paradox had been discussed by more ancient philosophers such as Heraclitus, Socrates, and Plato prior to Plutarch's writings; and more recently by Thomas Hobbes and John Locke. There are several variants, notably "grandfather's axe". This thought experiment is "a model for the philosophers"; some say, "it remained the same," some saying, "it did not remain the same". Variations of the paradox Ancient philosophy The paradox was first raised in Greek legend as reported by Plutarch, "The ship wherein Theseus and the youth of Athens returned from Crete had thirty oars, and was preserved by the Athenians down even to the time of Demetrius Phalereus, for they took away the old planks as they decayed, putting in new and stronger timber in their place, in so much that this ship became a standing example among the philosophers, for the logical question of things that grow; one side holding that the ship remained the same, and the other contending that it was not the same."
The 6 Best AND WORST Ways to Have Sex - Imgur - Nightly The Tunguska Explosion of 1908 - WFMU's Beware of the Blog - Nightly Did you know that in 1908 in Siberia, one of the most catastrophic, mind-blowing (and mysterious) cosmic impact catastrophes ever in the history of civilization occurred - and yet it wasn't widely known outside Russia (save for a few astronomy and research scientist enclaves) until around the 1970's? Even interested research parties didn't learn about or even set foot on the scene of disaster until 1921. It didn't make front page news in the papers when it happened because of the extreme remoteness of that region of Siberia. According to recordings at meteorological stations at the time, the seismic activity measured 5.0 on the Richter scale, and according to devices worldwide, the air compression wave went twice around the entire planet (bouncing both times). A "black rain" showered the immediate area afterwards (the substance was probably condensation mixed with dirt and debris sucked into the swirling vortex of the explosion and then spat out again). 1. 2. 3. 4. 5.
Use Google Earth flight simulator - Earth Help - Nightly You can fly around the globe in Google Earth using the flight simulator feature. This allows you to operate a simulated aircraft using either your mouse or another controller. Entering Flight Simulator To enter the flight simulator, do one of the following: Click Tools > Enter Flight Simulator Press CTRL + Alt + A ( + Option + A on the Mac) The Flight Simulator dialog box appears. Aircraft - Choose the airplane you would like to fly based on the descriptions shown. To change these settings, exit the flight simulator and press CTRL + Alt + A ( + Option + A on the Mac) Viewing Flight Simulator Help To view this page at any time, press CTRL + H. Exiting Flight Simulator To exit the flight simulator, do one of the following: Click Exit Flight Simulator Press CTRL + Alt + A or Escape (+ Option + A or Escape on the Mac).