just differential gauges that are calibrated to measure zero at atmospheric pressure. Absolute pressure gauges would only read "zero" if they were attached to an absolute vacuum. A common type of absolute pressure gauge is a barometer. Strictly speaking‚ a mercury barometer is really a differential gauge that measures the difference between the vapor pressure of the
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MECHANICAL PROPERTIES OF FLUIDS 1 Torricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984 kg m-3. Determine the height of the wine column for normal atmospheric pressure. 2 A vertical off-shore structure is built to withstand a maximum stress of 109 Pa. Is the structure suitable for putting up on top of an oil well in the ocean? Take the depth of the ocean to be roughly 3 km‚ and ignore ocean currents. 3 A hydraulic automobile lift is designed to lift cars with
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of the skin and decrease nerve conduction velocity. Constant exposure to arsenic can also cause lung cancer and can often be fatal. Link: http://ewasteguide.info/hazardous-substances Mercury (Hg) Fluorescent lamps that procure backlighting in LCDs‚ in some alkaline batteries and mercury wetted switches. Mercury is
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noaa.gov/features/02_monitoring/inland_flooding.html Weather Forecasts From folklore and proverbs to modern radar technology‚ the scientific understanding of weather prediction has evolved through time. Several inventions such as the thermometer‚ barometer and even satellites have given way to immense knowledge of weather conditions. Mild‚ sunny days are perfect for picnics‚ but those aren’t the weather conditions that led to the advances in weather predictions. “Severe weather events such as tornadoes
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Daniel Gabriel Fahrenheit On a brisk spring 12th to the 24th (resources are mixed) of May in 1686‚ a Mr. Daniel Gabriel Fahrenheit was brought into the sweet town of Danzig. Daniel did not grow up with both of his parents. His family members were merchants that moved from one city another. Fahrenheit’s great-grandfather had loved in Rostock‚ although research suggests that the Fahrenheit family originated in Hildesheim. In 1650‚ Daniel’s grandfather‚ Reinhold Fahrenheit vom Kneiphof moved from
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nitrogen ‚ oxygen‚ water vapor‚ ozone‚ and the particulates. 3. The cause of atmospheric pressure is exerted equally in all directions up‚ down‚ and sideways. 4. The two types of barometers measure atmospheric pressure ‚ atm ‚ millimeters and or inches of mercury and the millibars mb. Therefore‚ the two barometers are the mercurial and the aneroid. 5. The layer of the atmosphere in which weather occurs is called the troposphere. 6. The four main layers of the atmosphere are the troposphere
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A vertical U tube of uniform cross section contains mercury in both of its arms. A glycerine (d = 1.3 g/cm3) column of length 10cm is introduced into one of the arms. Oil of density 0.8g/cm3 is poured in the other arm until the upper surfaces of the oil and glycerine are in the same horizontal level. Find the length of oil column. Density of mercury is 13.6 g/cm3. (9.6cm) 2. Two communicating cylindrical tubes contain mercury. The diameter of one vessel is four times larger than
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Introduction In this experiment‚ I will try to use air pressure‚ along with some sheets of newspaper‚ to attempt to break a ruler. Air pressure is the weight of the atmosphere pressing down on the earth. A device called a barometer measures it in units called millibars. Most barometers use mercury in a glass column‚ like a thermometer‚ to measure the change in air pressure. I came up with this idea from when I read in a book about how some kids tried to break into a bank‚ using‚ among other things‚ air pressure
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Assignment 3 1. The Accuweather Corporation manufactures barometers and thermometers for weather forecasters. In an attempt to forecast its future needs for mercury‚ Accuweather’s chief economist estimated average monthly mercury needs as: N = 500 + 10X where N = monthly mercury needs (units) and X = time period in months (January 2008= 0). The following monthly seasonal adjustment factors have been estimated using data from the past five years: Month Adjustment Factor January 15%
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The Graph below successfully indicates Boyle’s Law visually: A: Volume Verses Pressure B: Volume Verses 1/P Part I of this experiment was specifically designed to validate Boyle’s Law‚ through the use of a homemade barometer. The open-end tube of the barometer‚ when moved to different heights above or below its equilibrium‚ visually achieves the application of various pressures (P) in which the volume (V) corresponding to it‚ can be measured. If pressure (P) times the corresponding volume
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