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  Item Reference: KCLCAL-1886-1887-737

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CLOTHWORKERS' SCIENCE EXHIBITIONS 730 IV $$D fC Describe Attwood's Machine and shew how it maybe need to prcve that the velocity acquired by falling bodies varies with the time of falling and that the space described varies with the square of the time Two weights of 14 and 15 ounces are connected by string which passes over pulley after they have been in motion for seconds the string breaks to what height will the lighter weight ascend and how far will the heavier weight fall in seconds after the breaking of the string Define the term centre of gravity pole 12 ft long balances on support placed at ft from one end it balances about its centre when weight of 45 lbs is placed at one end and 80 lbs at the other find the weight of the pole uniform cube of metal having an edge of 10 ccnti- metres is fastened to one end of wire and suspended in water so that cen of the wire are wetted Find the pressure on each face of the cube when the point of attachment of the wire is at the centre of one of the faces when the point of attachment is at one corner of the cube Explain the principle of action of the common pump How may it be converted into lifl-pump lift-pump is employed to raise water through vertical height of 200 ft if the area of the piston be 100 sq inches and cubic ft of water contain C2 lbs what force will be required to lift the piston beaker of water with wooden sphere floating on it is placed under the receiver of an air-pump explain how the sphere will be atfected on exhausting the air from the receiver Describe and exp ai the action of the double-barrelled air-pump If the volume of the barrel of the pump is one- ninth of the volume of the receiver find the density of the air in the receiver after strokes of the piston If the coefficient of relative expansion of mercury in
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