Asked by chris
What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
mass*gis the weight of the column
density*h*area*g= weight
density*h*g= pressure
Thanks for your help Bob. The answer i got is 51.3
is this what you also got?
Answers
Answered by
bobpursley
I don't work them out, but I have to tell you , 51.3 is totally meaningless without units. For example:
pressure= .789g/cm^3 * 65cm*9.8N/kg
= .789E3kg/m^3*.65m*9.8N/kg now in SI units.
= 5.03kN/m^2 or 5.03kPascals
check that
pressure= .789g/cm^3 * 65cm*9.8N/kg
= .789E3kg/m^3*.65m*9.8N/kg now in SI units.
= 5.03kN/m^2 or 5.03kPascals
check that
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