What is a superconductor? It is a state of matter for a material where there is zero resistance to electricity. We need to start by looking at what electrical resistance is. Electrical resistance is, rather obviously, a resistance to the flow of electricity. An electric current results when electrons flow from an area with a […]
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Why did people think Australia was there? They believed that the continents in the northern hemisphere and the southern hemisphere should balance each other out. In this question, I am talking about Europeans, particularly the British people, who would go on to colonize the island and subjugate the people that lived there. The aboriginal people
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Why is there a statute of limitations? Because after a certain amount of time has passed, evidence and people’s memories may no longer be dependable enough to fairly charge somebody and the evidence needed to prove their innocence may no longer exist. This is a difficult question because not every country has a statute of
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Why do volcanoes become dormant? Volcanoes become dormant because the magma in the Earth’s mantle can no longer reach the volcano. There are roughly 1,500 active volcanoes on Earth at the moment and 70 of them erupt every year. Most of those eruptions are small, but some are much bigger and have more of an
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What noise would the sun make? The sun doesn’t make a sound in the conventional sense because there is no air for the sound waves to travel through. Sound is a pressure wave that moves through a medium. The energy is passed from molecule to molecule until it runs out and the sound fades away.
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How did McCarthyism reach such a level? There was a genuine fear of communism in America that McCarthy used to accelerate his rise to power. McCarthyism is named after Joseph McCarthy, who was a senator from Wisconsin until his death in 1957. McCarthyism started in 1947 and it ended in 1959, two years after McCarthy
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Why do some things smell good and some things smell bad? The reason things smell good or bad is a combination of learned experiences and evolution. We smell in the same way that we taste. Everything around us is made of molecules and some of these molecules are released. If they happen to be released
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Why is Lake Titicaca so high up? It was formed in a hollow in the mountain and is replenished by melting glaciers. Lake Titicaca is located in the Andes mountains, on the border of Bolivia and Peru. Its surface is 3,812 m above sea level. It if often thought to be the highest lake in
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Why is stainless steel stainless? Stainless steel isn’t actually stainless, but a metal that is able to resist corrosion. Stainless steel is a type of metal that is able to resist corrosion. A lot of metals corrode when they are exposed to oxygen. Oxygen is a very reactive molecule, which is one of the reasons
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What causes the monsoon? The monsoons are caused by a wind change between the seasons. When we picture a monsoon, many of us think of the monsoon season that comes to India every year, but India isn’t the only country to get a monsoon. Monsoons occur across most of Southern Asia and Northern Australia. Across
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