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Could we use water instead of mercury to make a barometer? What advantages and disadvantages would...
In principle many different liquids could be used in a barometer. Mercury is usually preferred by virtue of its low vapour pressure and high density. As part of a school project, you have decided to build a barometer using water. Assuming the maximum pressure that the instrument will need to read is 1.05 atm, determine the height of the column required if (a) you ignore the vapour pressure of water or (b) you take the vapour pressure of water (PH2O=3.17...
3. We learned that a column of mercury in a barometer is around 760 mm in height. We also learned that a water barometer would have to be over 10 m tall. What would be the height of a column of isopropyl alcohol if it were used in a barometer? The density of isopropyl alcohol 785 kg/m3.
We learned that a column of mercury in a barometer is around 760 mm in height. We also learned that a water barometer would have to be over 10 m tall. What would be the height of a column of isopropyl alcohol if it were used in a barometer? the density of isopropyl alcohol is 785 kg/m3 (meters cubed).
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We discussed the advantages and disadvantages of the Progressive system. What disadvantage could a Regressive system have? Do they outweight the disadvantages of the progressive system? why or why not?
Pressure and Archimedes' Principle 2. Liquid mercury, which has a density of 13600 kg/m3, is commonly used in barometers to measure air pressure. A U-shaped tube closed at one end contains some mercury at the closed end (see figure) and vacuum above the mercury. Air in the open end exerts pressure on the mercury, and the mercury level rises until the mercury pressure in the closed end equals the air pressure in the open end. The height difference h between...
The mercury used in fluorescent lights is toxic. It would be great if we could find an alternative vapor in the discharge tube that was not toxic. We know that we can make good discharge lamps with sodium – why not use sodium (which produces yellow light) and coat the tube with phosphors to make white light?
What are advantages and disadvantages of stepping transmission mechanism and variable transmission mechanism? Why don’t we use variable transmission mechanism on CNC machine?
Describe the advantages or disadvantages of a particular Inventory Costing Method. When or why would you use one method over another? Why is it important to take a physical inventory count? What could be some reasons for a discrepancy?
We want to measure the speed of sound without having water vapor as a possible source of error. Which of the following scenarios would work? Place dessicant in the tube. Use mercury instead of water, since mercury has a very low vapor pressure. Instead of water, insert the tube into fine sand or powder. Perform the experiment in a vacuum. Use a fixed length tube with dry air or nitrogen, and a tunable speaker instead of the tuning fork Helga...
Problem 2: Fig. 2 shows a multi-fluid manometer used to measure the absolute pressure of the air container at A. What would be the reading L when the absolute pressure at A is 125 kPa? Mercury SG- 13.56, Oil SG 0.86. 01 Air 32 cm 18 em 35 15 cm Fig. 2 Water Mercury
Problem 2: Fig. 2 shows a multi-fluid manometer used to measure the absolute pressure of the air container at A. What would be the reading L...