What is St. Elmo’s fire? It is a glowing region that appears around tall structures, the masts of old ships, or the wings of aircraft. It is a plasma made by a corona discharge from the structure. St. Elmo’s fire looks like a blue or violet fire that has engulfed the tip of whatever structure […]
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What is the Fields Medal? It is a four-yearly prize given to mathematicians under the age of 40. It is the mathematical equivalent of the Nobel Prize. It is named after a Canadian mathematician called John Charles Fields. The prize is a medal, similar-looking to the Nobel Prize medal, and 15,000 Canadian dollars, which, as
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What are V1 and V2 on a plane? V1 is the point where a plane must take off and V2 is the speed where a plane can safely climb if one engine fails. Flying in a plane is incredibly safe these days. However, take off and landing are the two most dangerous parts of any
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What is the sunk cost fallacy? It is where people are reluctant to abandon a course of action because they have invested a lot of time or money in it, despite abandoning it being the most logical choice. In economics, a sunk cost is a cost that has already been incurred and cannot be returned.
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What is a gluon? It is a massless subatomic particle that carries the force that binds quarks together, known as the strong force. There are four forces that affect everything in the universe. These are gravity, the electromagnetic force, the weak force, and the strong force. They are known as the four fundamental forces. Gravity
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Christiaan Huygens was a mathematician, physicist, engineer, astronomer, and inventor. He was responsible for many discoveries during his lifetime. He discovered a new way to make more accurate telescope lenses by grinding and polishing them differently, and he used those lenses to find the first moon of Saturn, Titan, and to observe the true shape
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Why do we say, “pass the bar”? The bar was a physical bar that separated a courtroom between the judges, barristers, and participants, from the spectators and average people. In all English countries, and in some other countries, to become a member of the law profession a person needs to pass the bar exam before
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How do sharks sense electricity? With a special organ called the ampullae of Lorenzini. They are not the only sea life that are able to detect electricity. All living creatures give off an electric field. All organisms use energy for a whole range of functions, which means we need to be able to generate it.
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What color is the sea? It is technically blue, but that depends on the depth and what particles are in the water. The sky is blue because the blue light wavelengths are scattered by molecules in the air. This is not why the ocean is blue. Generally the sea is blue because water absorbs red
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Is a killer whale a whale? Yes and no. Yes, because dolphins are technically whales. No, because a killer whale is a dolphin. They are called orcas, although they are more commonly known as killer whales. A killer whale is called a whale because of its size, but it is actually a dolphin. The orca
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