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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Why do dry rooms have more static? This is because water in the air naturally conducts electricity. What is static electricity? Every atom has positively charged protons, negatively charged electrons, and neutral neutrons. Almost all atoms have an equal number of protons and electrons, making them stable and electrically neutral. If an atom picks up
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What is the range of a cell phone tower? The average maximum range of a phone mast is about 40 km, 25 miles. How does a cell phone tower work? Cell towers have detectors and transmitters to receive and transmit radio signals. When you want to look at a website on your phone, my site
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What causes a bunged-up nose and a runny nose? A bunged-up nose is caused by inflamed nasal tissue and a runny nose is caused by too much nasal fluid. What is the nose for? Most animals have one and they do pretty much the same function for all animals that have a nose. The nose
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How is blood pressure measured? There are two measurements for blood pressure. The first number is the pressure of the blood when it is being pumped by the heart, called the systolic pressure. The second number is the pressure of the blood between heartbeats, called the diastolic pressure. The amount of blood we have in
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