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What are some examples of exothermic and endothermic processes?

Exothermic reactions or processes cause a release of heat into the surrounding region while endothermic processes cause an absorption of heat, which results in a drop of temperatures in the surrounding regions.Exothermic processes: processes such as condensation of water vapor, rusting iron, burning sugar and mixing water with acids all cause a reaction that emits heat energy. Objects in the surrounding region will inevitably begin to experience a rise in temperature. Other examples of this type of reaction include burning of candles, mixing sodium sulfite and bleach, formation of snow in clou..

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What are advantages and disadvantages of hybridization?

Hybridization naturally occurs more often in plants than animals, say authors at NWE. Animal hybrids, such as the mating between two butterfly species, can fail to pass along brilliant colors or camouflage that protect butterflies from predators. Similarly, cross breeding between white-tailed deer and mule deer produces offspring that inherit neither parent's strategies for avoiding predators. Sometimes, however, hybridization creates new genes that help organisms survive, especially in changing climates.

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What is the bright star next to the moon?

The brightness of stars viewable from Earth is measured using a scale known as "magnitude." Given that stars can be at an infinite number of different distances from the Earth, their magnitudes are usually charted as both their apparent brightness and their absolute brightness. Apparent magnitude refers to the observable light as seen from Earth. Absolute magnitude is a measurement based on a standard distance

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What are the chemical and physical properties of calcium?

Calcium's chemical properties are attributed to its location in group 2 of the periodic table. As an alkaline earth metal, it is a good reducing agent for preparing other metals, such as uranium and thorium. It reacts violently when placed in water, forming calcium hydroxide, more commonly known as lime. This is the reason why water that is high in calcium causes lime buildup on the interior of pipes. Calcium also reacts rapidly when exposed to air. It develops an oxide coating, which prevents the mass of calcium from corroding. If exposed to air at a high temperature, calcium burns to pr..

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How much does a gallon of diesel fuel weigh?

A U.S. gallon is used in the U.S., some Latin American countries and some areas of the Caribbean. The Imperial gallon is used in the U.K., Canada and some areas of the Caribbean. As diesel gets colder, the density increases, and the energy that a gallon contains and the potential miles per gallon the fuel can achieve increases with it. Alternatively, as the temperature rises, the density and potential miles per gallon decreases.

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What are clues scientists use to find underground water?

The conditions for shallow ground water to be located in sufficient quantities are much more favorable under valleys than under hilly areas. Water may be located at swamps and streams but may not be in sufficient quantities. The type of vegetation in the area is another clue for the hydrologist. The presence of water-loving plants and trees, such as cottonwoods or willows, are good indicators of groundwater at shallow to moderate depths.\nScientists also look at maps that depict cross sections of the rocks in an area along with the number and positions of various kinds of rocks. Long layers of..

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How do you calculate muzzle velocity?

To give an example of this formula, a 115 grain bullet travelling at 1300 feet per second has a muzzle velocity of 431 foot-pounds. Foot-pounds are the units used for measuring energy in the United States customary and imperial systems of measurement. If you would rather calculate muzzle velocity in joules, you can easily convert between the two. One foot-pound is equal to 1.4 joules. Therefore, in the above example, the bullet with the muzzle velocity of 431 foot-pounds can also be said to have a muzzle velocity of 585 joules.\nThe numbers required to solve this formula are usually found on t..

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What color does red and green make?

The other two secondary colors are purple, formed by mixing red and blue, and orange, formed by mixing red and yellow. The tertiary colors are formed by mixing a primary color with an adjacent secondary color. The tertiary colors are blue-green, yellow-green, yellow-orange, red-orange, red-violet and blue-violet. Red and green are complementary colors, as are blue and orange and yellow and purple. Mixing two complementary colors results in brown.

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What are examples of homozygous recessive phenotype?

Organisms carry both dominant and recessive alleles of a gene. Such organisms would be called carriers of a recessive allele. In this instance, the organism would only show the dominant phenotype of the gene. Cystic fibrosis is another homozygous recessive phenotype. Other diseases, such as Huntington's, are also expressed through the recessive phenotype. However, individuals with Huntington's have either a mutant-mutant expression or a normal-mutant one.\n \nHomozygous means that the organism contains two copies of the same allele for a particular gene. Homozygous recessive means th..

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What are some of the deciduous forest's abiotic factors?

Unlike tropical forests, temperate, or deciduous forests experience all four seasons. They experience large temperature variations with winter temperatures ranging between -22 and 30 degrees Fahrenheit and summer temperatures reaching as high as 90 degrees. Annual rainfall in a deciduous forest is usually between 29 and 60 inches, which is second only to the tropic regions.A deciduous forest is a forest in which most of the trees lose their leaves each year. They are located all over the northern hemisphere in places such as Europe and North America. When the leaves fall, they begin to decompo..

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