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How tall is 65 inches?

Accurate height measurements are obtained by removing shoes, hair accessories and hair styles that have the possibility of interfering with the measurement. Both feet are flat, with their sides touching and their backs against the wall. The head is held straight while a flat object is set on top of the head; the flat object remains in a position parallel to the floor. The height mark is notated, and the accurate measurement is obtained by using a tape measure from the floor to the mark.

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Does lightning come from the ground?

Lightning is caused by electrical charges in the atmosphere. As opposite charges build up, they break through the insulation provided by the air and send an electrical burst within the cloud, to the ground or to another cloud. The lightning can come as either a positive or negative charge. Positively charged lightning is more dangerous to people than negatively charged lightning.

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How is physics related to technology?

More complex technology, naturally, makes use of more rarefied physical concepts. GPS satellites, for example, adjust their internal timekeeping to account for the relativistic effects of their motion. Einstein's theory of Special Relativity describes the dilation of time that fast-moving objects experience. Without taking steps to correct for this change in the rate that time passes, GPS coordinates would be inaccurate by an unacceptable factor.\nIn general, physics describes the sort of things that are possible in the universe, and technology is eventually built to do work within the co..

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With which pathway does cellular respiration begin?

After the citric acid cycle in aerobic respiration, many electron transport chain reactions occur in the mitochondria of organisms. These reactions form large concentrations of adenosine triphosphate, which is used by the cell as energy. In anaerobic respiration, pyruvate can enter the fermentation pathway to produce large concentrations of adenosine triphosphate. Both aerobic and anaerobic respirations lead to adenosine triphosphate production to give the cell and the organism energy. Adenosine triphosphate is the main energy source for all living organisms.

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What is the difference between sleet and snow?

Very cold conditions in the upper atmosphere cause water vapor that normally turns to rain to freeze around dust particles. These frozen particles take on a hexagonal ice-crystal shape; this is what is defined as snow. For snow to reach the ground, atmospheric temperatures must remain below freezing as the snow falls. Changes in temperature result in snow partially melting and being reclassified as sleet.\nSleet is not to be confused with freezing rain. If snow completely melts then hits a layer of freezing air just before it strikes an object on the ground it may freeze instantly upon contact..

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What are the reasons why so many people live on the "Ring of Fire"?

According to the United Nation's Atlas of Oceans, approximately 44 percent of the world's population lives in coastal regions. The Pacific Ring of Fire has coastline along Asia, all of western North and South America and in Oceania. This sheer volume of coastal land, combined with the long history of people in Asia, means that many settlements have sprung up bordering the Ring of Fire.\nMost of the area within the Ring of Fire rests on the Pacific tectonic plate, and the coastal areas around it have a series of plates that bump into it. The friction created as these plates move cause..

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What is the standard enthalpy of formation?

The standard enthalpy of formation is found by subtracting the change in heat of reactants from the change in heat of the products, where product refers to the chemicals on the right side of the equation, and reactant refers to those on the left. Commonly used standard enthalpies of formation include -110.5 kilojoules per mole for carbon monoxide, -241.8 kilojoules per mole for water and -393.5 kilojoules per mole for carbon dioxide.

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What does "CO2" mean?

In humans, carbon dioxide is one of the products of cellular respiration. During this process, glucose and oxygen are used to produce energy. When the glucose is oxidized, its carbon atoms combine with oxygen atoms to form carbon dioxide. Carbon dioxide is also one of the greenhouse gases that harm the environment. Humans add carbon dioxide to the atmosphere when they burn fossil fuels or drive vehicles powered by gasoline. According to the United States Environmental Protection Agency, the most effective way to reduce carbon emissions is to reduce the consumption of fossil fuels.

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Is China trying to mine the moon?

In 2013, China launched a moon rover named Yutu that successfully landed on the moon's surface. It was deployed with a mission of surveying the moon's surface and soil makeup. Though Yutu was able to drill more than 105 yards deep into the moon's soil, it became stuck soon after landing and was not able to complete its mission.\n\nThe soil samples collected by Yutu contained calcium, aluminum and silicon, but China's plans to establish mining operations on the moon hit a major stumbling block when the Yutu was unable to complete its data gathering mission. As of 2014, China..

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Why is Olduvai Gorge important to archaeologists?

Research on this site, which is located in Northern Tanzania, led to the discovery of unparalleled wealth of paleontological and archaeological data for the study of phases of the evolution of the early man. This was the first site where the discovery of the culture of the earliest stone tools was made. It was also among the first sites where the discovery of the earliest Acheulean was made, and the traditional view of the transition from Oldowan and Acheulean was established here. One of the topics that the modern Paleoanthropologists discuss today is the disappearance of the culture of the e..

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