A cylindrical disk of wood weighing 50.0 [N] and having a diameter of 25.0 [cm] floats on a liquid of density ? = 0.750 [g/cm3]. The cylinder of liquid is 60.0 [cm] high and has a diameter that is the same as that of the wood. What is the gauge pressure halfway down the liquid?

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Chapter12: Fluid Dynamics And Its Biological And Medical Applications
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A cylindrical disk of wood weighing 50.0 [N] and having a diameter of 25.0 [cm] floats on a liquid of density ? = 0.750 [g/cm3]. The cylinder of liquid is 60.0 [cm] high and has a diameter that is the same as that of the wood. What is the gauge pressure halfway down the liquid?

This is the guide but i still dont get it :( hope you can help!

 

 

Guide starts here: Some key equations for this problem is the definition of gauge and absolute
pressure:
Pabs
"gauge + Patm
or when rearranged,
= Pabs - Patm
Pgauge
Now, it is straightforward to calculate for the gauge pressure. The absolute pressure is the total
exerted pressure (Force per unit area) on a certain region of the fluid. In this problem, you have three
such sources: the disk Paiski the fluid Pf, and the ambient pressure Patm: Express the gauge pressure
in terms of these quantities. After doing so, you can easily substitute the given and yield Pgauge:
Transcribed Image Text:Guide starts here: Some key equations for this problem is the definition of gauge and absolute pressure: Pabs "gauge + Patm or when rearranged, = Pabs - Patm Pgauge Now, it is straightforward to calculate for the gauge pressure. The absolute pressure is the total exerted pressure (Force per unit area) on a certain region of the fluid. In this problem, you have three such sources: the disk Paiski the fluid Pf, and the ambient pressure Patm: Express the gauge pressure in terms of these quantities. After doing so, you can easily substitute the given and yield Pgauge:
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