Giraffe Pressure Difference - 20Pa

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Giraffes experience a pressure difference between their heads and hearts due to their long necks, which is crucial for their physiology. Given a height of 1.95 meters and a blood density of 1.05 kg/m^3, the pressure at the head is calculated using the formula p = dgh, resulting in approximately 20.475 Pa. The pressure at the heart is zero since it is at the reference height. Thus, the pressure difference between the giraffe's head and heart is confirmed to be 20 Pa. This adaptation is essential for maintaining proper blood circulation in such tall animals.
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Homework Statement



Giraffes have long necks, creating different pressures between their heads and hearts. Giraffes have evolved to deal with this difference. If the distance between a giraffe''s head and heart is 1.95m and its blood has a density of 1.05kg/m^3, what is the difference in pressure between the head and heart?

Homework Equations



p=dgh

The Attempt at a Solution


p=?
d= 1.05kg/m^3
h=1.95m
p=(1.05kg/m^3)(10m/s^2)(1.95m)
p=20.475Pa(the head)
p=?
d=1.05kg/m^3
g=10m/s^2
h=0m
p=(1.05kg/m^3)(10m/s^2)(0m)
p=0Pa(the heart)
20.475Pa-0pa=20Pa
 
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