Make a drawing of a U-tube manometer like the one inside a sphygmomanometer. Explain using your diagram whether blood pressures are absolute or gauge pressures. For a reading of "110", draw the mercury level roughly to scale on your diagram. Indicate the pressures on top of both sides of the manometer on your diagram. Explain using a calculation on how the relationship P=P0 + ρgd applies to the reading "110" and to your diagram.
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