Question

Please answer them asap

Answer 1

first 2 figures are depicting different types of lever application.
third figure is depicting an air pressure meter, probably a Torricelian barometer.
fourth figure is showing the phenomenon of density in action. objects having different densities float or sink in water.
fifth diagram is showing the a manometer, it is also showing the principle of flow of water from higher pressure region to lower pressure region. this diagram shows a pressure gradient



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