Giraffe Pressure Difference - 20Pa

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In summary, giraffes have evolved to deal with the difference in pressure between their long necks and their hearts. Using the equation p=dgh, we can calculate the difference in pressure to be 20Pa, with the head experiencing a pressure of 20.475Pa and the heart experiencing 0Pa.
  • #1
disneygirl828
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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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  • #2
Yes that's correct.
 

FAQ: Giraffe Pressure Difference - 20Pa

What is "Giraffe Pressure Difference - 20Pa"?

"Giraffe Pressure Difference - 20Pa" refers to the difference in atmospheric pressure between the top and bottom of a giraffe's neck, which is approximately 20 pascals (Pa). This difference allows giraffes to regulate blood flow to their brains while standing up and is essential to their survival.

Why do giraffes have a pressure difference in their necks?

Giraffes have a pressure difference in their necks to counteract the effects of gravity. Due to their long necks, giraffes have to deal with a significant amount of blood flow to their heads when standing upright. The pressure difference helps to regulate this blood flow and prevent it from causing damage to their brains.

Is a pressure difference of 20Pa significant?

Yes, a pressure difference of 20Pa is significant for giraffes. This difference may seem small compared to the atmospheric pressure at sea level (101,325Pa), but it is crucial for the giraffes' survival. It allows for proper blood flow and prevents the giraffe's brain from being damaged by gravity.

How is the pressure difference in a giraffe's neck measured?

The pressure difference in a giraffe's neck is measured by inserting a catheter into the giraffe's jugular vein and measuring the blood pressure at the top and bottom of its neck. This method allows scientists to accurately determine the pressure difference and its significance for the giraffe's health.

What other animals have a similar pressure difference in their bodies?

Other animals that have a similar pressure difference in their bodies include elephants, giraffe's close relatives. Elephants have a pressure difference of approximately 30Pa in their trunks, which helps them to regulate blood flow and prevent swelling in their large noses.

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