How does a monorail balance? The single rail of a monorail train is much wider than a rail on a regular railway and there is no worry about balancing. However, they use side wheels for support. There are two types of monorail train. The first type, and probably the most common type, ride on top […]
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Is palm oil bad? It depends. It is bad in terms of health and environmental costs, but it is good because it has more oil than other crops and provides an income for people who would otherwise be living in poverty. What is palm oil? It is made from the fruit of the African oil
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What is survivorship bias? It is when researchers focus on the individuals that have passed a selection process, while forgetting those that have not. It is an error in logic. Survivorship bias doesn’t have to be about people who have survived, it can reference people or things that have survived a selection process. There are
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Why are there ten pins in bowling? Because nine pin bowling was outlawed. Bowling is a very old game because it is a very simple concept. As long as people have a ball and something to throw it at, they can bowl. Balls and pins have been found in a children’s tomb from 5,200 years
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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 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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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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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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Why does an atomic bomb make a mushroom cloud? Because of the speed of the blast and the heat from the fireball. We have all seen images of nuclear bombs being detonated and they always have a very distinctive cloud that is in the shape of a mushroom. These mushroom clouds can be tens of
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When were photographs first used in newspapers? The first photograph was published in a newspaper in 1848, but they didn’t become common for a long time after that. Depending on the type of paper, modern newspapers have a lot of photographs. The percentage and the size of the photographs may vary depending on whether the
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