It would be the electromagnet because that is how it spins
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The moment of the resultant of these two forces with respect to O 376 lb-ft CCW which is <span>about moment center point O.</span>
He has 1 1/30 gallons, or 31/30 gallons, you can find this by setting all the fractions to a common denominator and adding them
To develop this problem it is necessary to apply the concepts performed to the absolute pressure based on the reference pressure (atmospheric) and the pressure that is generated due to the height of the column of the measured liquid.
In mathematical terms the previous concept can be expressed as

Where
Atmospheric Pressure
Density
g = Gravitational acceleration
h = Height
Our values are given as

g = 9.8m/s


Replacing we have then that



Therefore the absolute pressure in the test section is 99.9019kPa