Physics
purto
2021-05-08 06:27:42
Rank the pressure from highest to lowest (a) bottom of a 20-cm tall container of salt water, (b) bottom of a 20 cm-tall container of fresh water, and (c) bottom of a 5-cm tall container of mercury
ANSWERS
CeciliaMiskinis
2021-05-08 13:06:28

The answer is C, A, B in that order.Pressure  = Density * gravity * height.Let us look at these three substances and assume gravity is 9.8 m/s squared.The Salt water has a density of 1029kg/m3, height of 0.2 meters. Pressure of salt water will be 1029*9.8*0,2 = 2,016 pFresh water has a density of 1000kg/m3Pressure of salt water will be 1000*9.8*0.2 = 1,960 paMercury has density of 13,534kg/m3Pressure of mercury will  be 13534*9.8*0.05 = 6,631 paSo mercury exerts the highest pressure even at only 5cm height.

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