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What are some animals that went extinct over the last 100 years?

The golden toad was once a common animal throughout its range in Costa Rica, and its breeding sites were well-known, allowing scientists to reliably monitor the species' population. However, by 1988, there were only a handful of breeding pairs left. Since 1989, it is considered extinct.\nThe Pinta Island tortoise was declared extinct in 2012. The last surviving animal was named Lonesome George and had been part of an ultimately unsuccessful breeding program that began in the 1970s.\nThe Caspian tiger was last sighted in the wild in the early 1970s. It is considered extinct, but scientists..

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How many barrels of oil are in a metric ton?

The number of barrels per metric ton varies from country to country. In the U.K., there are 7.56 barrels per metric ton, while in Saudi Arabia, there are 7.4 barrels per metric ton. After distillation, the number of barrels per ton can be anywhere between six and eight. Outside of North America, oil companies usually report oil production results in cubic meters.

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What is 5 feet 6 inches in inches?

The inch is a standard unit of length in the United States, Canada and the United Kingdom. Converting this measurement of 66 inches to yards results in a total of 1.83 yards. A comparable measurement of 66 inches in the metric system is 1.68 meters.

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How do you convert 62 degrees Celsius to Fahrenheit?

Multiply the value in degrees Celsius by 1.80Multiply 62 degrees Celsius by 1.80. The product is 111.6. Written as an equation, the problem looks like this: 62 x 1.80 = 111.6Add 32 Add 32 to the answer from step one. The equation should look like this: 111.6 + 32 = 143.6. Label the answerLabeling the answer finalizes the conversion from degrees Celsius to degrees Fahrenheit. The final answer here is 143.6 degrees Fahrenheit.

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What is an example of a dichotomous key?

Dichotomous keys, also known as single access keys or sequential, analytical or pathway keys, are tools used by scientists and amateur naturalists to identify organisms of unknown species. They are not intended to be used as classification systems, though the questions may be grouped according to contemporary classification schemes.\nWhen using a dichotomous key, the user is presented with two questions about the organism at hand, and he can only answer one of the questions in the affirmative. Each affirmative answer leads to another pair of questions until the user correctly identifies the or..

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Does coffee dissolve in water?

According to CoffeeChemistry.com, a typical coffee bean is composed of 28 percent organic, water-soluble material and 72 percent insoluble cellulose. When hot water is added, as in brewing or boiling, only the soluble material is completely dissolved, giving the solution its distinct coffee flavor and aroma.\nInstant coffee is made from coffee beans that have undergone a process of roasting, grinding, extraction and freeze-drying or spray-drying. The process alters the composition and property of the coffee beans so that the resulting product, instant coffee, can dissolve completely and instan..

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What is the opposite side of the elbow called?

The superficial veins that cross through this area (the basilic vein, the cephalic vein and the median cubital vein) make it an ideal spot for a physician to draw a patient's blood, to place a stethoscope while measuring blood pressure or to palpate for a brachial pulse. This part of the human anatomy also contains the radial nerve, the biceps brachii tendon, the brachial artery and the median nerve.

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How many centimeters is 5 feet 6 inches?

There are alternatives to using the hand-calculated method to convert feet to centimeters. Several Internet search engines, including Google, Bing and Yahoo, provide a quick conversion calculator. To use them, one must enter the figures in the search box. For example, when “5.5 ft to cm” is input, Google’s results are instant, while Bing and Yahoo will require hitting the enter key or search icon to obtain the result 167.64 cm. Other websites include Metric-Conversions.org and WorldwideMetric.com. The U.S. uses measurements based on the imperial system, while most of the world uses metr..

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Is hydrogen soluble in water?

Because hydrogen gas is a non-polar molecule, it does not readily form hydrogen bonds with water molecules, making it not very soluble in water. The solubility of hydrogen in water is comparable to the solubility of nitrogen or oxygen gas, both of which are also non-polar. Polar gasses, such as carbon dioxide, exhibit solubility values 100 times greater than that of hydrogen.

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Why is the ocean salty?

As the water re-evaporates into the atmosphere, the salt is left behind in the ocean. Over a long time period, the salt accumulates and becomes more concentrated. According to the U.S.G.S., about 3.5 percent of the weight of seawater comes from the dissolved salts. In addition to surface runoff, hydrothermal vents on the ocean ridge also contribute a large amount of salt and minerals to the ocean, adding to the overall salinity.

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