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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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What is the professional name for the person who studies fossils? Paleontologist
why does water erupt from geysers?
Folic acid has the following important physico-chemical properties: a) It is a yellow, spear-shaped crystalline substance. b) The compound is sparingly soluble in water.
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what is the scientific classification of a protozoan
I just don''t get it
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