How can planes fly upside down? Because of the shape of their wings and the angle that they fly at. Planes fly because of lift. Air is not an empty substance. It has molecules in the same way as a table or a chair. The air is made up of nitrogen, oxygen, carbon dioxide, neon, […]
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How does aspirin work? Aspirin works by stopping an enzyme called cyclooxygenase. When our tissue or organs are damaged or infected, they produce prostaglandins. These are fatty acids that act like hormones. Prostaglandins do many different jobs in the body. They are similar to hormones but they are not hormones. Hormones are produced in glands,
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How many dimensions are there? There are either 4, 10, 11, or infinite dimensions, depending on what theory you read. What is a dimension? A dimension is the minimum number of coordinates needed to specify a point within that dimension. We can experience four dimensions. The first dimension is length. A straight line exists in
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How did Galileo realize that the Earth orbits the sun? He realized it when he observed the orbit of Venus. Galileo was born in 1564 in Pisa, Italy. Galileo is famous for saying that the Earth orbits the sun rather than the sun orbits the Earth, but he was not the first person to come
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Why doesn’t silicone melt in the oven? Because it doesn’t have a specific melting point. Most of us will not put rubber or plastic dishes in our oven because they will obviously melt. Natural rubber has a melting point of 180°C. The melting point of plastic depends on the type of plastic. PET (polyethylene terephthalate)
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What is a solid-state battery? It is a battery that uses a solid electrolyte instead of a liquid solution. As we have more and more electrical appliances, we need more batteries. Our vehicles are gradually becoming electric as well and the size and efficiency of their batteries dictate how much range they have. All batteries
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Why are carrots orange? Because they contain carotenoids, which are orange. Carotenoids are organic pigments that are produced by plants, algae, and some bacteria and fungi. They can be found in vegetables such as pumpkins, carrots, corn, and in animals such as canaries, lobsters, and flamingoes. In plants and algae, carotenoids absorb sunlight for photosynthesis.
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How does LSD work? Nobody actually knows how LSD affects the brain. LSD is the common name for Lysergic Acid Diethylamide. So, why is it LSD and not LAD? LSD comes from the German Lysergsäurediethylamid. It was synthesized on November 16, 1938 by Albert Hofmann, a Swiss chemist. He was searching for ergot alkaloid derivatives,
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How does a hydrogen fuel cell work? They split hydrogen atoms into protons and electrons to generate electricity. There are several different types of fuel cell. This is how a basic hydrogen fuel cell works. The hydrogen is pressurized and fed into the storage tank. When the power is required, pressurized hydrogen is fed into
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Why does hot air rise? Hot air rises because it is less dense than cold air. When something heats up it is having thermal energy applied to it in some form. If you hold your hand out on a sunny day, infrared radiation is supplying energy to the molecules in the skin of your hand,
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