Why is a plane’s propeller at the front but a boat’s at the back? Because of how they move through the medium they travel in, the angle they need to move at, and the obstacles they encounter. The propeller was obviously first used on a boat because they were invented long before planes were. The […]
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What is racketeering? It is a criminal act that usually involves extortion or a scheme to extract illegal profits. Racketeering became a big thing on October 15, 1970, when the Racketeer Influenced and Corrupt Organizations Act became law in the United States. You may have heard of it in a movie because it is shorted
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Why does sunburned skin peel? It peels because the skin cells are dead, and the body is getting rid of them to make way for new cells. When looking at what makes sunburned skin peel, we have to look first at what causes sunburn? It is caused by ultraviolet light that comes from the sun.
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What causes an epileptic seizure? It is caused by abnormal electrical activity in the brain. There is not one reason why people have epilepsy and there is not one type of epileptic seizure. Epileptics can suffer from focal seizures and generalized seizures. As their names suggest, focal seizures are focused on one hemisphere of the
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What is a metal? A metal is any material that readily loses its outer shell electrons, can be polished to be highly reflective of light, is opaque, conducts heat, conducts electricity, is ductile, and malleable. The bond between the atoms in the molecules cause all of these properties and are what makes a material a
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What is a limited company and a shell company? A limited company is one where the risk is limited to the money the company has. A shell company is a company without any business operations or assets. I’m going to use the word company here, but there are some differences between company and corporation. The
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In the 1440s, Johannes Gutenberg invented the printing press and changed the world. It is not very often where you can say that an invention caused such enormous ripples that without it, we wouldn’t be where we are today. The wheel seems an obvious example. The printing press made the spread of information, knowledge, discoveries,
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What will happen to the Voyager spacecraft? Unless they collide with anything, they will probably keep going for several billion years. Voyager 1 is currently 24.3 billion km away from Earth and Voyager 2 is 20.3 billion km away. Despite being called number 2, Voyager 2 was launched in August 1977, a month before Voyager
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Is moss one plant or many plants? A patch of moss is made up of many plants. There are many types. There are approximately 20,000 species of moss plants and some of them are huge. The Dawsonia moss grows up to 50 cm tall. However, most moss plants are much smaller than that. Mosses have
#908 Is moss one plant or many plants? Read More »
What is the difference between a slave and a serf? A slave is the property of the person who owns them while a serf is bound to the land they live and work on for generations. Civilizations have taken slaves for as long as one group of people has fought another group of people. It
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