How did London Bridge end up in America? London Bridge ended up in Arizona, America because it was bought by an industrialist called Robert McCulloch who bought it and shipped it over the Atlantic. The London Bridges that is in America was built in 1831 and it was sold by the City of London in […]
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Why do rechargeable batteries lose power as they age? Because the process of recharging a battery is not 100% efficient and because of chemical degradation. These days, the majority of us use rechargeable batteries every day. While writing this, I have four devices currently recharging. I am sure you have something similar while you are
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What is snuff? Snuff is a form of powdered tobacco that you can inhale, giving you a quick nicotine hit. Snuff has been around for a long time. Native people living in the area that is now Brazil used powdered tobacco leaves as snuff. They ground the leaves using a rosewood pestle and mortar, which
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Why does America use the Electoral College system? America uses the Electoral College because the early American government didn’t trust the voting people to be able to vote for the correct candidate instead of the one whose name they just happen to recognize. How does the Electoral College system work? The Electoral College has 538
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Are electric planes possible? Electric planes are possible, but not for long distances yet. Electric cars are a very common site on the road these days, and you would think electric planes would be the next step, but electric planes are much harder to make than we think. The main problem is the range they
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Why do planes use halon fire extinguishers? Halon fire extinguishers are used on planes because they don’t conduct electricity, they don’t leave a residue, they put out the fire effectively, and they are not very toxic to people. There are many different types of fire extinguisher, but they all work on generally the same principle.
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Why does soap produce foam? All foaming soaps contain chemicals that are called foaming agents. As their name implies, their job is to make a foam when you add water and air to the soap. The main chemicals that you find in soap are ammonium lauryl sulfate and sodium dodecyl sulfate. Both of these are
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Why is a sandwich called a sandwich? It is named after John Montagu, the 4th Earl of Sandwich, but he isn’t the person who invented it. There is no way to work out when sandwiches were invented because people presumably ate them once there was bread. A sandwich merely consists of a filling between two
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What is leukemia? Leukemia is a type of cancer that begins in the bone marrow. It is a group of different cancers, rather than one type of cancer. “Leukemia” comes from the Greek words “leukos”, which means white, and “haima”, which means blood. It is named in Greek, but the Greek’s didn’t know what it
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What is a thorium reactor? A thorium reactor is a nuclear reactor that is powered with thorium and not uranium. Let’s look at how a current nuclear reactor works and then look at how a thorium reactor would work. Nuclear reactors work on the principle of nuclear fission. This is where an atom of a
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