Calendar: 1860-1861 Page 495

496 APPLIED SCIENCES fiuHrosftatuss Define fluid and distinguish between liquids and gases Mention some illustrations of the fact that fluids transmit pres- sure without any loss of the power so transmitted Prove that the pressure in the interior of mass of water varies as the depth to which you descend What would be the pressure upon square inch at depth of two miles below the surface of the sea-a cubic foot of salt water weighing 64 lbs Show how to find the pressure of fluid upon any surface immersed in it Prove that when body is immersed in fluid it will lose as much weight as the weight of the fluid displaced Define the specific gravity of substance Show how to find the of solids whether they be heavier or lighter than water What is Marriotte's law How is it proved by ex- periment Explain the action of an air-pump how is the degree of exhaustion ascertained Work the following examples cubic inch of one metal weighs lOJoz and cubic foot of another metal weighs 960 lbs compare the of the two metals The weight of piece of wood in air is lbs that of piece of lead in water is lbs and the weight of the lead and wood together in water is lbs Find the of the wood tube 24 inches long is closed at one end and mercury is poured in to fill 16 inches of the tube If the tube be now inverted over basin of mercury find the altitude of the mercury in the tube If the density of the air in receiver be diminished to half its original density after strokes compare the capacities of the receiver and barrel hollow copper sphere whose internal diameter is feet just floats in water find its thickness the specific gravity of copper being