Giraffe Pressure Difference - 20Pa

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SUMMARY

The discussion focuses on calculating the pressure difference between a giraffe's head and heart due to its long neck. Using the formula p = dgh, where d is the density of the blood (1.05 kg/m³), g is the acceleration due to gravity (10 m/s²), and h is the height difference (1.95 m), the pressure at the head is calculated to be 20.475 Pa. The pressure at the heart is 0 Pa, resulting in a net pressure difference of 20 Pa, confirming the giraffe's adaptation to its unique physiology.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Familiarity with the equation p = dgh
  • Basic knowledge of pressure measurement units (Pascals)
  • Concept of gravitational acceleration (10 m/s²)
NEXT STEPS
  • Research the physiological adaptations of giraffes related to blood circulation
  • Explore fluid dynamics in biological systems
  • Learn about pressure calculations in different contexts, such as hydrostatics
  • Investigate the effects of height on blood pressure in other animals
USEFUL FOR

Students studying biology or physics, zoologists, and anyone interested in animal physiology and fluid dynamics.

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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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