How does C-4 work? It rapidly produces gases at an explosive velocity. C-4 is a plastic explosive called Composition C-4 and it is the fourth in the series. Composition C was discovered in World War II and the first type was only called Composition C. Each variation had problems that were ironed out by the […]
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How do mountain goats climb cliffs? Through a combination of their hooves, muscles, and lack of fear. Mountain goats can often be seen climbing cliff faces and even dams. There are two main reasons why they climb. The first is for food. They eat plants, grasses, and alpine vegetation, but they also lick the rocks
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How do astronomers work out how far away a star is? They use the star’s parallax and the brightness of the star. The easiest way to work out the distance to a star is to use parallax, but this only works for stars that are less than 3000 light years away. Parallax is a way
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How did the Rothchild family start? They were able to start a banking house and install it in several different countries. The Rothschilds are a family that are involved in international banking and finance, amongst a host of other occupations, one of which being the famous Bordeaux wine. At one point they were the richest
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Why can you test for drugs in urine? Because the liver breaks them down and then the kidneys remove drugs from the body by expelling them in the urine. There are two things we need to look at here: how are drugs metabolized by the body and what do drug tests test for? How are
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Why can camels go so long without water? They can survive for 15 days without water because they have several adaptations. Camels are renowned for their ability to go long periods of time without drinking any water, which is one reason why they are so well suited to desert life. We can only survive for
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Is Krav Maga effective? Yes, or the Israeli army wouldn’t teach it. However, you need to train in realistic situations. Krav Maga is a martial art that was created for the Israeli Defense Forces. The words krav maga are Hebrew. קרבנגע. Krav means “combat” or “battle” and maga means “contact” or “touch”. It was created
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How can the inner core of the Earth switch rotation? Because it is separated from the solid mantle and can rotate at a different speed. The Earth has four layers. There is the outer crust that we and everything alive lives on. The crust is about 40 km deep and is only 1% of Earth’s
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How does a laser printer work? They use static electricity to imprint an image onto the paper. Inkjet printers and laser printers are different in that inkjet printers use ink and laser printers don’t. An inkjet printer has liquid ink attached to nozzles that are fixed into the print head. When you want to print
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Can you see past the horizon? Depending on the weather, and the amount of refraction, yes, you can see past the horizon., The horizon is the point where Earth curves away too much for you to be able to see it anymore. Every body in the universe has a horizon, but it depends on the
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