What are the physics of roller coasters? Designers of roller coasters have to pay a lot of attention to physics because they need the roller coaster cars to move, they need them to stay on the tracks, and they need them to go fast enough to be thrilling but not so fast that they kill […]
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How do bone conduction headphones work? Bone conduction headphones send sound waves through the bones of your skull into your inner ear without using the eardrum. Our ear is made up of several parts. The outer part is the bit that you can see and it is called the pinna. It is shaped to direct
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How does a flare gun work? They trigger an explosive which shoots the flare high into the sky, where it explodes. There are several different kinds of flares and flare guns are only one type. Let’s look at the others first. The simplest kind of flares are basic smoke flares. These are flares you can
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Is space based solar power possible? Yes, space based solar power is certainly possible, but there are a lot of problems that need to be overcome first. The idea behind space based solar power is that they would have unimpeded sunlight for virtually 24 hours a day, every day. Solar power stations on Earth are
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How can carbon be captured? There are many ways carbon can be captured when it is produced and then stored. However, it is much easier to stop carbon at source than it is to take carbon out of the atmosphere once it is already there. Let’s look at some methods to stop the carbon before
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What is the IoT? The IoT is the Internet of Things, and it refers to all of the physical objects that are connected to the Internet. The term Internet of Things was coined in 1999 by a computer scientist called Kevin Ashton. He had been tasked by Proctor & Gamble to come up with a
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How does YouTube learn what I want to watch? YouTube basically knows what types of videos you watch and how long you watch them. It has a lot of other information as well, but it does its best to match new videos with the type of video you are always watching. All social network sites
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How is nanotechnology used in medicine? Currently, nanotechnology is used to deliver drugs, improve diagnostics, and help regenerate after illness or surgery. Modern technology is still limited, and the future of nanotechnology could bring an amazing revolution in medicine. Let’s look at what nanotechnology is, how it is currently used, and how it could be
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How does Wi-Fi work? Wi-Fi transmits information from a router to your device and vice versa using radio waves, which is why you can use it without a cable. I always thought Wi-Fi stood for “wireless fiber”, but apparently, it doesn’t actually stand for anything, and is just a brand name. The technology behind Wi-Fi
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How do submarines navigate? Submarines navigate using a mix of sonar, inertial navigation systems, and GPS. There are a lot of naval and civilian submarines in the world. The number of civilian submarines would probably be easier to work out than the number of military ones because most countries keep that number a secret. Or,
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