TN TET 2012 Paper 2 Math and Science Paper

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Question : 139 of 150
 
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A student of a class IX has been provided with the following equipment and materials
Rubber tube, clips, one holed rubber stopper, y- shaped glass tube, balloons, rubber sheet, wide mouthed glass bottle and twine.
By making use of the above, the student can prepare a working model of
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