Fluids-Uses And Properties

Description
"The lecture starts with the statement and explanation of Pascal's law and then discusses the application of this in Hydraulic Jack and explains beautifully why it does not violate the priciple of conservation of energy Effect of gravity on pressure of fluids is examined and pressure at a depth is calculated.An experiment with an empty and completely filled can shows how pressure is transmitted throughout a liquid according to Pascal's law. Using the expression for pressure in terms of height of liquid coloumn it is shown for vessels of different shape how pressure is same at different points. It shows a simple demonstration of atmospheric pressure and explains the height of liquid coloumns for Mercury and Water barometer. A simple experiment shows how a can when evacuated crumbles due to atmospheric pressure. Scuba diving and snorkeling are two underwater activity which also is explained.The use of manometer to measure the overpressure to be generated required for snorkeling is shown by an experiment Here the activities are based on sucking of air instead of blowing out. By measuring how far one can suck it is possible to find out how deep one could snorkel. At the end it is shown how a person can suck some liquid even from a height of five metres"

Prof. Walter Lewin, 8.01 Physics I: Classical Mechanics, Massachusetts Institute of Technology: MIT OpenCourseWare), http://ocw.mit.edu (Accessed June 14, 2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc