Effect of Iodine on mercury concentrations in dental-unit wastewater John Michael Panganiban and Ian Jasper Ocampo Objective: This study was undertaken to determine whether iodine used to control bacteria in dental unit wastewater could increase mercury concentrations in dental wastewater. Introduction: Two of the major concerns in dentistry are biofilm in dental unit waterlines and the contamination of dental unit wastewater with mercury. Biofilms are microscopic communities that consist
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planet-like moon‚ Titan has a diameter 50% larger than Earth’s natural satellite‚ the Moon‚ and is 80% more massive. It is the second-largest moon in the Solar System‚ after Jupiter’s moon Ganymede‚ and is larger by volume than the smallest planet‚ Mercury‚ although only 40% as massive. Discovered in 1655 by the Dutch astronomer Christiaan Huygens Titan was the first known moon of Saturn‚ and the fifth known satellite of another planet. Titan is primarily composed of water ice and rocky material.
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Reaction Paper Doomsday‚ Aliens‚ and Thoughts By Juliene Lindy Tiu The biblical theory that states God made the universe and the Big Bang Theory that says the cosmos was created through a massive explosion: these two are only some of the speculative theories as to how the universe was formed. Undoubtedly‚ there are a million more probable theories for this just like there are a million ways to kill a cat. It is just so ambiguous. I mean‚ how can we even know if any of our theories really do
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The Sydney Tar Ponds are the most toxic hazardous waste site in North America‚ located in Cape Breton. These tar ponds were caused essentially from a century of steel making‚ polluting it with high levels of PCB‚ mercury‚ lead and polynuclear aromatic hydrocarbons. This was first discovered in 1980 by the Department of Fisheries and Oceans in Sydney Harbor‚ which resulted in a period of events and frustrations for both the government and residents. In1982 lobster fisheries were all closed down due
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1.|So far as we know‚ the first person who claimed that natural phenomena could be described by mathematics was| |A) Copernicus. B) Pythagoras. C) Aristotle. D) Ptolemy.| |Ans: BSection: Chapter 2‚ Introduction| 2.|The ancient Greek thinker Pythagoras held the view that| A)|triangles do not exist.| B)|natural phenomena are wonderful to watch but cannot be described by mathematics.| C)|the Sun is at the center of the planetary system.| D)|natural phenomena can be described
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are Jupiter‚ Saturn‚ Uranus‚ Neptune‚ Earth‚ Venus‚ Mars‚ and Mercury. 4. What is the basis for classifying a planet as an inner or an outer planet? Which are the inner planets? The outer planets? ANS. The Mercury‚ Venus‚ Earth‚ and Mars are called the inner planets. The outer planets are Jupiter‚ Saturn‚ Uranus‚ and Neptune. 5. Which Planets are small? Large? Which are Earth-like planets? ANS. The small planet is Mercury. The large planet is Jupiter. The inner planets are also called
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motion. Ptolemy’s model‚ in part‚ sought to explain this behavior. The inferior planets were always observed to be near the sun‚ appearing only shortly before sunrise or shortly after sunset. To accommodate this‚ Ptolemy’s model fixed the motion of Mercury and Venus so that the line from the equant point to the center of the epicycle was always parallel to the earth-sun line. 17. Supernova in Cassiopeia. Although‚
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Mercury is the second smallest planet in the solar system. It is 4‚879 kilometers across. Compare that with our moon‚ which is 3456 km across‚ and you can see that mercury is not very big. In fact‚ Jupiter’s moons Ganymede and Callisto and Saturn’s moon Titan are bigger! Even though those moons are bigger‚ Mercury weighs a lot more than they do because it is made of mostly metal and rock. In fact‚ Mercury has the most metals for its size of any planet in the solar system. Mercury is also the closest
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Titan‚ is the only moon in the Solar System to possess an atmosphere. FACT NINE Saturn has such a low density (meaning that its particles are far apart) that‚ if there was an ocean big enough‚ Saturn would float on it. In comparison‚ Earth and Mercury would sink to the bottom quickest. FACT TEN A year on Saturn would take almost thirty Earth years. However‚ a day on Saturn is about 10 and a half
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rotation‚ solid surfaces‚ no rings‚ and few satellites. These planets include Mercury‚ Venus‚ Earth‚ and Mars. On the other hand‚ the jovian planets are composed primarily of hydrogen and helium. They generally have low densities‚ rapid rotation‚ deep atmospheres‚ rings‚ and numerous satellites. These planets include Jupiter‚ Saturn‚ Uranus‚ and Neptune. The closest terrestrial planet to the sun is Mercury. Mercury is relatively small‚ and technically the eighth largest of all the planets.
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