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A simple mercury barometer
Seal single end of a glass tube about 80 cm in length by rotating it in a gas flame. The tube should be held as almost vertical as possible. Join a small funnel or thistle tube to the open end of your barometer tube with a short length of rubber tube. Pour mercury into the tube gradually. If air bubbles are trapped they may be separated by gently shaking the mercury in the tube up and down. Fill the tube to within 1 cm of the top. The last part is best filled by using a medicine dropper so that mercury will not be exhausted. Fill the tube until a little mercury extends above the tube level. Pour about two centimetres of mercury into a bottle or dish. Place your handle over the end of the tube and place the tube open end down in the jar of mercury. Take away the finger from the tube when it is under the surface of the mercury. When this tube is properly support it will serve as a mercury barometer. The height of the mercury among the levels in the jar and the tube calculates the air pressure in centimetres or inch of mercury.
What is coal? The remains of trees and shrubs grew millions of years ago, when the weather was mild and moist.
name 4 heterotrophic plants names
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QUESTION 1 (a) What is the main objective of the Occupational Safety and health Act 2005? (b) State 6 other objectives. Briefly describe them. QUESTION 2 (a) What cr
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Objectives After completing this exercise you should be able to: 1. Locate the source and control points of gas/electricity/water supply in the lab you have visited, 2. D
How to make a simple vacuum pump Secure a bicycle or automobile hand pump. Open the pump and delete the piston. Un- screws the bolt that holds the leather washers. Reverse the
Explain Betice Jones Protein - abnormal constituent of urine Betice-Jones Protein: Bence-Jones proteins are the small proteins (dimers of iminunoglobuljn light chains) normally
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