What is a geosynchronous orbit? It is an orbit that exactly matches the rotation of the Earth. A satellite in geosynchronous orbit goes around the Earth at the same speed the Earth rotates, completing one orbit every 24 hours. From the ground, the satellite appears to be stationary. There are thousands of satellites above us […]
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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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What is price elasticity of demand? It is a measure of how much demand for a product changes depending on its price. An object’s elasticity is how much it can stretch. The elasticity of rubber is obviously higher than that of steel. In economics, the elasticity of a price is how much that price can
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How do flies perceive time? Flies see the world in slow motion, possibly seeing things four times slower than we do. We have probably all tried to swat a fly sitting on a table. You swing your hand towards it, you impact the table and you’re sure you got it, only to see the fly
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What causes turbulence? It happens when an airplane flies through turbulent air (hence the word turbulence) and gets buffeted around. Turbulence can cause a plane to suddenly rise or fall hundreds of meters very quickly. It can also cause a lot of shaking, and it can cause some damage to the plane, but it very
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What is the difference between a herb and a spice? Herbs are the fresh part of the plant and spices are the dried root, stalk, seed, or fruit. Herbs and spices have been used for thousands of years. People have used them to flavor food and as medicines. They are both different from vegetables because
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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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What vegetables came from the New World? There are many, but potatoes, tomatoes, corn, beans, squash, chili, cacao, peppers, and vanilla are good examples. The foods that came from the New World into Europe ended up changing world cuisine in surprising ways. In the end of the 15th century, Spaniards and other Europeans first reached
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What is flash memory? It is a type of memory that can store data without power and can erase memory in blocks. It is a type of electronically erasable programmable read only memory (EEPROM). Computers store information on their memory chips in binary, which means everything is reduced to a 1 and a 0. When
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