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How does a perpetual motion watch work?

The rotor is the essential component in a self-winding watch. It is a large semi-circular piece of metal within the watch that connects to various gears. As the wearer moves their arm, the rotor is pulled around by gravity and pivots. This motion is transferred to a series of reducing gears and reverser gears. These gears eventually transfer the energy to the mainspring, a spiral mechanism that controls the gears that move the hands on the watch face.\nEach movement of the arm winds the gears only a tiny bit, but the overall amount of movement of the wearer's arm is enough to keep the wat..

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How does gravity effect the solar system?

Planets and other objects follow orbit around the Sun because they are moving laterally relative to the Sun while they are simultaneously being pulled toward the Sun. Orbiting objects do not usually follow perfectly circular paths. Most often, orbits take the shape of an ellipse or oval.\nAll the objects in the solar system orbit the Sun because it is the object with the most mass. The Sun has so much more mass than the Earth that gravity pulls objects toward its surface 28 times faster than they fall toward the Earth.\nSatellites orbit planets and other objects because they feel a stronger gr..

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What is the goal of the human genome project?

The fact is, there is less than a 2 percent difference between humans and the closest living hominid species — genetic cousins effectively. These are the great apes, such as gorillas and chimpanzees. That 2 percent has given humanity minds like Einstein, so it's not hard to imagine that such a small difference in DNA can be expressed in diverse ways. The results thus far have determined that modern humans alive today at one point may have intermingled with other hominid species, such as Neanderthal. As well, it has been established that every current genetically different group at one p..

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What year was lead certified?

Some states banned lead in paint before 1978. Lead from paint is the leading cause of lead poisoning in the United States.\nLeaded gasoline was banned in all U.S. gasolines as of Dec. 31, 1995. In 1986, regular gasoline contained 0.1 grams of lead per gallon, down from 4.0 grams per gallon in the 1970s. Since 1996, unleaded gasoline is allowed to contain no more than .05 grams of lead per gallon.

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What is the boiling point of methanol?

Methanol has a melting point of minus 98 degrees Celsius and a flash point of 11.1 degrees Celsius. Methanol is a colorless and inflammable liquid that is also called "wood alcohol." It is produced naturally during bacteria metabolism. It is used for the production of bio diesel as fuel and as an antifreeze. Methanol is poisonous and can cause blindness, coma and even death when ingested. Symptoms of methanol poisoning include central nervous system depression, dizziness, headache, confusion, nausea and loss of coordination.

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Why do things float in water?

If the mass and volume of different solid materials are known, then the density of these materials can be determined by using the formula "Density = mass/Volume." By comparing the densities of different materials, it is possible to know whether or not they will sink or float in water.Similarly, fluids with different densities can be placed together in a container. By examining the different fluid layers formed in the container, the fluid with the greater density can be determined. For example, if oil is added to a glass of water, the oil will float to the top because it has a lower density tha..

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How does a gamma ray telescope work?

Because visible light represents a small portion of the electromagnetic spectrum, astronomers started using other instruments to observe and measure the universe. At the far end of the spectrum, radio telescopes detected unseen radiation from galaxies and discovered quasars. As rocketry began to evolve, astronomers built special telescopes to observe infrared radiation from stars and galaxies above the Earth’s atmosphere. X-ray and gamma ray telescopes followed in the early 1960s.\nGamma ray telescopes operate on satellites and carry special detectors tuned to measure high-energy gamma rays ..

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What country has the highest rainfall?

Precipitation, or rain, is defined in meteorology as any form of water, liquid or solid, that falls from clouds. It is measured by the amount of rain water or snow collected in a cylinder-shaped plastic or metal rain gauge over a period of time. The highest recorded 12-month rainfall of 905 inches was measured in the village of Cherrapunji in Northeastern India in 1861. The town of Lloro, in Choco, Colombia, is a contender for the place with the highest rainfall on Earth because of its average annual rainfalls of about 520 inches.Both the highest and the next to highest average rainfall countr..

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What class lever is a stapler?

Force applied to the open end of the stapler closes the stapler at its hinge and drives the load, the staples, through the paper. In first-class levers, like the see-saw, the fulcrum is situated between the effort and the load. Third class levers have the effort between the fulcrum and the load, and they rely on greater force to move small loads long distances. Golf clubs and hockey sticks are examples of third class levers.

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How can you neutralize nitric acid?

Get neutralization equipments readyGather all required equipment, including sodium carbonate for neutralization of the acid, one or two gallon-sized polythene buckets as required, protective tools such as goggles, an apron, gloves and 500-milliliter beakers. Obtain pH indicator strips to determine when neutralization of the acid by the base is achieved.Obtain information about standard personal safety measures Obtain detailed information by reading Material Data Safety Sheet (MSDS) or contact environmental Health and Safety Department Hazard Communications Section if MSDS cannot be found. Try ..

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