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Fig.B-15
The hydrostatic paradoxon: the hydrostatic forceacting on the flat plate bottom is the same in all three cases in spite of the fact that weight of liquid poured into each vessel is different and in the case C the force actually acts in the opposite, upwards direction.
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Fig.B-16
Below: two-arm scales for demonstrationof the hydrostatic paradoxon: With equal bottom piston areas and equal height of liquid surfaces the scales will be balanced in spite of the fact that weights (= gravity forces) in the both vessels differ substantially. History of this device goes back to Simon Stevin (1548-1620), military and civil engineer under Maurice of Nassau | |
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Fig.B-17 |
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Vaclav TESAR : "BASIC FLUID MECHANICS"