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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 washers by turning them over. Change the washers on the piston and insert in the pump cylinder. A pump of this sort will serve to do a lot of simple vacuum experiments
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To show the presence of nodules of nitrogen-fixing bacteria on the roots of legumes Carefully spade up some leguminous plant like as clover, alfalfa, soy-beans, cow peas, etc.
#qDescribe the factors which decide the broad area of Scientific activityuestion..
Modern Concept of Preventive Medicine: Now let us see how the current concept of preventive medicine came into being. The story began only 150 years ago. People returning
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Do Nancy Christopher''s peculiar habits make her abnormal? Why or why not?
A lamp chimney force pump Replace the piston in the lift pump explained above with a one-hole stopper. Fit the piston rod by the hole. Fit the bottom of the chimney with a two-
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