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Tuesday 11 December 2012

Rising Water


Question:How to make water rise

Equipment: blade,straw,a glass of water.
Hypothesis:I thought we had to put a hot object over the glass of water.
Method:First you cut the straw not in half just 5 millimeters .
last but not least put the straw into the  glass of water then blow and see what happens.

Observation: the water began to spray through the opening of the straw
Result:the water began to rise
 
Explanation:Moving air exerts less sideways pressure then still or less turbulent air around it.The moving air at the upper end of the straw reduced the pressure in the vertical straw.At atmospheric pressure of the water was now greater than the pressure in the straw,some water was forced up into it.



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