Mercury barometer with recording chart attachment - uses double acting motor to position piston in tube providing temp. correctionA glass or metal tube is inserted into a deep reservoir and contains a depression piston. An arm is mounted on the tube to support a drum (9) driven by a clock ...
Who invented the barometer, and in which year? Why is mercury instead of ethyl alcohol used in barometers? What is the unit used for viscosity? What is an electric generator? Explain its various components. What property of water makes it an effective coolant? Briefly, what ...
The pressure meter such as a barometer, sphygmomanometer for measuring arterial blood pressure, or manometer which uses fluid columns, giving reliable and accurate presentation of pressure to be measured. Mercury is not used and there is automatic correction for variations in the ambient temperature. ...
21st century.)Barometersandmanometersalso used its highdensityand lowvapour pressure. However, mercury’s toxicity has led to its replacement in these instruments. Gold and silver dissolve readily in mercury, and in the past this property was used in the extraction of these metals from their ...