What are totem poles for? They have many different uses, but a common use it to show the lineage of a family or notable events that have happened and need to be remembered. They are a kind of written record for the tribe. When we watch Hollywood movies, every Native American tribe has a totem […]
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How does a TV screen display different colors? By using different intensities of red, green, and blue. These colors can be displayed with liquid crystal or with gases. All screens, no matter how they are made, are divided up into pixels. The word pixel was made from a combination of “picture” and “element”. One pixel
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What are pork barrel projects? It is when politicians secure public money for projects in their home constituencies in order to get support and be reelected. The projects are usually expensive and usually not necessary. In most countries that have a democratically elected government, it is made up of members that are chosen to represent
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Are lighthouses still necessary? Yes, they are because technology can fail, and some things don’t show up on maps or with sonar. The Lighthouse Directory lists 24,300 lighthouses on its site. The majority of them are still active. This fact alone is enough to show that they are still necessary. Lighthouses cost money to run
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How does a Maglev train work? They use magnets to move the train forwards and to reduce friction. Maglev is the shortened form of magnetic levitation, and it is a train based on the principle of magnetic attraction and repulsion. We all know that when you have two magnets, the opposite poles attract each other
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Where and when did language originate? This is an impossible question to answer, but, probably, in and around Africa between 150,000 and 50,000 years ago. Our ability to communicate is obviously one of the things that sets us apart from animals. Nearly all animals have the ability to make sounds, but their communication is limited
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Why does the Leaning Tower of Pisa lean? It leans because the ground under the tower is not hard enough and has settled. The Leaning Tower of Pisa is 55.86 meters tall, and it leaned by 5.5 degrees off center at its peak. It was stabilized in the 1990s and its lean was reduced to
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How fast could an electric car go? The current top speed achieved is 412 km/h. They could potentially go faster than that. Electric cars have the potential to be faster than combustion engine cars because of the way they apply power to their wheels. A combustion engine works by burning gasoline to make pistons move
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Could telekinesis be possible? It depends on how you define telekinesis. Moving things with just brain power could not be possible, but using technology to accomplish it certainly could be possible. “Telekinesis” comes from the Greek “tele” meaning “far off” and “kinesis” meaning “movement”. It is the idea that distant objects can be moved merely
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How do night vision goggles work? There are two types: the old style and the new style. The old-style goggles work by detecting and enhancing infrared light. The newer ones work by digitally enhancing the image. We cannot see well in the dark. Our eyes work by collecting reflected light radiation and transmitting it to
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