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How many centimeters is in 28 inches?

The foot or inch system has a base of 12. This means that there are 12 inches in a foot or 36 inches in a yard. The metric system, however, has a base of 10, which means that there are 100 millimeters in 1 centimeter and 100 centimeters in 1 meter. Both centimeters and inches are used to measure length or distance.

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Is sublimation endothermic or exothermic?

Under a certain set of conditions, a substance can exist in both a solid, liquid and gas phase, called a triple point. By manipulating the temperature (increasing) or pressure (decreasing) of the substance near the triple point, it is possible to force it to change directly from a solid to a gas. In order to excite the atoms or molecules of a substance enough to turn into a gas, energy must be added, which makes sublimation an endothermic process.

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What is the difference between prezygotic and postzygotic?

A zygote is the genetically unique fusion of female and male reproductive cells. It contains all the genetic information required to develop into a baby. The zygote travels down the Fallopian tube until it attaches to the uterine wall; at this point, it is considered a living organism since it goes through the four criteria of life: it reacts to stimuli, exhibits growth, reproduces and has metabolism. The concept of postzygotes and prezygotes is widely used in the theory of reproductive isolation.

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What are examples of reciprocating motion?

The reciprocation cycle is comprised of two opposite movements called strokes. A crank on a mechanism is used to turn circular motion into reciprocating motion.\nIn rack and pinion mechanisms, a table is moved up and down the central pillar of a drill as a crank is turned. This makes it easy to move a table with minimal effort.\nIn Scotch yoke mechanisms, linear motion is converted into rotational motion. The piston, or other reciprocating part, is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part.\nA traversing head shaper mechanism works by moving a harde..

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What is equal to 173 centimeters?

Another equivalent of 173 centimeters is 1.73 meters, since there are 100 centimeters in a meter; 1730 millimeters also equals 173 centimeters. The height of 68.11 inches is between the average male height of 69.4 inches tall and the average female height of 63.8 inches. The average stride distance for a man is 2.2 feet, which is about 2.5 times smaller than 173 centimeters.

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What happens in the light independent reactions of photosynthesis?

Biologists divide plants into three categories called C3, C4 and CAM, based on the mechanism and location of the dark reactions of photosynthesis. Most plants are designated C3, meaning the first stable compound they generate in the dark reactions is PGAL. This pathway is optimal for plants living in mild environments with abundant moisture and carbon dioxide. Examples of C3 plants include wheat, rice, oats and tomatoes.\nIn contrast, C4 plants tend to inhabit hotter, drier environments. Examples include corn, sugarcane and sorghum. In order to minimize water loss, C4 plants have a specialized..

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What does oxygen react with?

Oxygen reacts with several main group elements, including lithium, sodium, potassium, magnesium, calcium, barium, boron, aluminum, nitrogen, phosphorus, sulfur, fluorine and xenon. Chemical reactions do not necessarily have to be dramatic events, and many of oxygen's reactions with other elements are relatively mundane. Because it is both highly reactive and very naturally abundant, oxygen is commonly found in elemental compounds such as mercuric oxide (HgO).

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Why do comets have tails?

Scientists believe that comets are made out of dust and ice made out of methane, carbon dioxide, ammonia and other materials that might enclose a core made out of rock. In contrast to the tails, these cores might be less than 10 miles across.\nWhen the ices of the comet first begin to turn to gas, they form a sort of halo around the comet that's called a coma. This coma can also be about a million miles around. Moreover, as comets streak through space they leave debris trails that might fall to the Earth as meteor showers. Some of these meteor showers are annual events. They have names su..

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What is the index of refraction?

The index of refraction is different for every material in the known world. Since it depends on how quickly light passes through the material, materials that are thicker have larger indices of refraction. For example, the index of refraction for diamond is 2.417, while the index of refraction in air is 1.00. Index of refraction values can be used to determine the speed of light through the material and can be used theoretically to determine if light would bend away form the normal or towards the normal as it moves from one media to another.

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What is the speed of light in miles per second?

The speed of light cannot be achieved by anything with mass. Einstein's general theory of relativity states that the mass of an object grows and its length contracts the faster it moves. An object travelling at speed of light would have infinite mass and no length, which is impossible.\nWarp-speed travel, as faster-than-light travel is known, is therefore not achievable, but it is not impossible either. Scientists are working on theories that allow for such travel once technology reaches a higher level.

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