A full-term fetus typically has a mass of 3.54 kg (a) What pressure (in N/m2) do

Question

A full-term fetus typically has a mass of 3.54 kg (a) What pressure (in N/m2) does the weight of such a fetus create if it rests on the mother's bladder, supported on an area of 87.0 cm2? N/m2 (b) Convert this pressure to millimeters of mercury mm Hg Determine if it alone is great enough to trigger the micturition reflex (it will add to any pressure already existing in the bladder) The pressure of the fetus is enough to trigger the micturition reflex. The pressure of the fetus is not enough to trigger the micturition reflex.

Explanation / Answer

A) Pressure is P = F/A = (3.54*9.8)/(87*10^-4) = 3987.58 N/m^2
B)
1 N/m^2 = 0.0075 mm of Hg

then

3987.58 N/m^2 = 3987.58*0.0075 = 29.9 mm of Hg

The pressure of the fetus is enough to trigger the micturition reflex

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