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What is the common name for citric acid?

Citric acid is a naturally occurring substance that gives citrus fruits their sour tang. It is extracted and sold in a white powder form as a food additive to individual consumers for candy making and to large companies, such as soda producers. It is sold under the name citric acid online and in most larger grocery stores. The name "citric acid" is also used on ingredient lists when it is used as a food additive.

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How many miles can a man walk in a day?

The distance covered in a day's walk can be affected by the terrain. Walking uphill requires more energy, and walkers often move slower when walking up a hill and faster walking downhill. Rest periods would further reduce the distance covered in a day, though some time could be made up if the individual alternated walking and running.

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What is the terminal velocity for a human?

This velocity works out to between 110 and 125 mph. A skydiver in the bullet position usually achieves this speed within six or seven seconds. After that, the diver's acceleration is balanced against the resistance provided by the atmosphere. By altering their body positions, professional skydivers sometimes reach higher velocities in free fall; the record terminal velocity is 321 mph.

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What causes rain to fall?

Rain is responsible for most of the fresh water on Earth and it is essential to life. It is part of the water cycle, the continuous movement of water between the Earth and the atmosphere.\n\nIn the water cycle, water is evaporated and transpired into the atmosphere. There it is condensed, where it falls as rain, or in the colder months, sleet or snow. The runoff and ground water is evaporated and the cycle begins again. Earth as a whole experiences precipitation and evaporation levels that are almost exactly the same.\n\nThe driest place on Earth is the Atacama Desert in Chile. Parts of this d..

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What is a homogeneous compound?

Homogeneous compounds can be either liquid, solid or gas and are also known as homogeneous mixtures. Because of their uniform nature, the individual components in a homogeneous compound are not distinguishable by sight and are not easily separated by mechanical means. They can be separated through advanced methods, however, such as through the use of a centrifuge.\nHomogeneous compounds are a type of mixture, meaning that they are comprised of more than one component, which may be an element, ion or molecule. The other type of mixture is a heterogeneous compound, in which individual components..

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What are some interesting facts about ruthenium?

Russian chemist Gottfried Osann thought he discovered three new platinum metals in 1828, which he named polinium, pluranium and ruthenium. However, in 1944, another Russian chemist named Karl Klaus proved that Osann had only discovered a very impure form of ruthenium. As he was the first to isolate the element in its pure form, he is generally given credit for the discovery. However, he still chose to use the name thought up by Osann due to the fact that the original platinum ores the ruthenium was derived from were mined in Russia.\nRuthenium is only found with other platinum metals in a few ..

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What was the impact of Erwin Schrodinger's atomic cloud model?

Schrodinger’s work largely took the form of a probability equation. In essence, the equation demonstrated that while the electron was more likely to be found at a specific point at a given point in time, it was impossible to determine whether or not the electron actually was there.\nExperimental results cannot provide any more definitive answers regarding the location of the electron at a particular point in space and time. Visible light’s wavelengths are too large to view atomic structures, so light microscopes are of no use to atomic investigations. Normally, scientists examine very smal..

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When will Yellowstone erupt?

Around 80 minor eruptions have occurred since the last major one, and these created relatively minor lava flows. Approximately 70,000 years ago was the last time lava flowed out of Yellowstone's supervolcano, and about 640,000 years ago is when the last major eruption occurred, which created the large caldera visible today.

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What is the polar bear's role in the ecosystem?

Polar bears are the largest terrestrial carnivores in the world, reaching up to 1,760 pounds. As such, they have no predators other than humans and each other. While cannibalism is somewhat rare, it does occur from time to time. Polar bears capture their prey by relying on their superb senses, sharp claws, strong jaws and effective camouflage.\nWhen polar bears die, they are eaten by a variety of scavengers. If they die on land, vultures, wolves and coyotes are among those that benefit most from the large carcass; if they die in the ocean, crabs and other bottom-feeding organisms consume the c..

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When is the constellation Pegasus visible?

Pegasus is named after the mythical winged horse of Greek mythology. Pegasus sprang from the neck of Medusa, a gorgon whose gaze turned men to stone, when she was beheaded by Perseus. The name Pegasus means "springs" or "waters". Pegasus attempted to carry the hero Bellerophon to Olympus to join the gods but failed. Bellerophon fell off, and Pegasus continued to Olympus where he carried thunder and lightning for Zeus. Zeus eventually placed Pegasus among the stars. The constellation only depicts the top portion of the horse but is still the seventh largest constellation. It occupies an area of..

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