1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Viktor [21]
3 years ago
5

Giraffe bending to drink. In a giraffe with its head 1.83 m above its heart, and its heart 2.04 m above its feet, the(hydrostati

c) gauge pressure in the blood at its heart is 246 torr. Assume that the giraffe stands upright and the blood density is 1.06 × 103 kg/m3. In torr (or mm Hg), find the (gauge) blood pressure.
(a) at the brain (the pressure is enough to perfuse the brain with blood, to keep the giraffe from fainting)
(b) at the feet (the pressure must be countered by tight-fitting skin acting like a pressure stocking).
(c) If the giraffe were to lower its head to drink from a pond without splaying its legs and moving slowly, what would be the increase in the blood pressure in the brain? (Such action would probably be lethal.)
Physics
1 answer:
Nastasia [14]3 years ago
8 0

Answer:

1)     Pm₂ = 1.9 10⁴ Pa , b)  P_feet = 5.4 10⁴ Pa , c)  Pm₄ = 4.4 10⁴ Pa

Explanation:

a) Pressure can be found using Bernoulli's equation

         P₁ + ½ rho v₁² + rho g y₁ = P₂ + ½ rho v₂² + rgo g y₂

The amount of blood that runs through the constant system, all the blood that reaches the brain leaves it, so we can assume that the speed of entry and exit of the total blood is the same. In this case the equation is

       P₁-P₂ = rgo h (y₂-y₁)

The gauge pressure is

      Pm = P₁ -P₂

      Pm₂ = 1.06 10³ 9.8 1.83

      Pm₂ = 19 10³ Pa

      Pm₂ = 1.9 10⁴ Pa

The pressure in the heart is

      Pm₁ = 246 torr (1,013 10⁵ Pa / 760 torr) = 3,279 10⁴ Pa

Therefore the gauge pressure is an order of magnitude less

Total or absolute pressure is

      Pm₂ = P_heart - P_brain

      P_brain = P_heart - Pm₂

      P brain = 3,279 10⁴ - 1.9 10⁴

      P brain = 1.4 104 Pa

b) on the feet

    Pm₃ = rho g y₃

    y = 2.04 m

    Pm₃ = 1.06 10³ 9.8 2.04

    Pm₃ = 21 10³ Pa

   Pm₃ = 2.1 10⁴ Pa

Total pressure

    Pm₃ = P_feet + P_heart

   P_feet = Pm₃ + P_heart

  P_feet = 3,279 10⁴ + 2.1 10⁴

 P_feet = 5.4 10⁴ Pa

c) If you lower your head the height change is

    h = 1.83 +2.04

    h = 4.23 m

    Pm₄ = 1.06 10³ 9.8 4.23

    Pm₄ = 4.4 10⁴ Pa

You might be interested in
Which statement describes a force acting on an object?
Aleonysh [2.5K]

Answer: B. A magnet pulls a nail towards it

Explanation: Out of the list of answers, this is the only answer where a force is acting on an object. the act of the magnet pulling on the nail is the force, and the nail is the object.

7 0
3 years ago
A basketball rolls to a stop along a gym floor without anyone touching it. What answer choice BEST explains why this occurred?
Minchanka [31]
Frictional forces are exerting force against the basketball, causing it to stop.
7 0
3 years ago
Read 2 more answers
Article 5 of the Fundamental Orders of Connecticut is MOST LIKELY related to which idea?
Sauron [17]

Answer:

Option A, Rule of law

Explanation:

The complete question is

Article 5 of the Fundamental Orders of Connecticut is MOST LIKELY related to which idea? A) rule of law B) personal freedom C) individual rights D) limited government

Solution

It is the first colonial constitution and also the first written constitution in America. It was first applicable to the inhabitants and Residents of Windsor, Harteford and Wethersfield

The article V of the Fundamental Orders of Connecticut is subjected to the Courte of Election of the towns. The towns were responsible for maintaining their own form of government through election with the involvement of general public. The 5th article is about the Judicial Department and the process of selection of judges who further governs the city. This abide by law of equality by vesting equal right of choosing the judges.

3 0
3 years ago
Assume you are in the car and the car is moving at a certain speed to
Setler79 [48]
You are at rest with respect to the car.
You are in motion with respect to the School.

6 0
3 years ago
The national government would like to start a program that would give states money for flood relief. Which of the following stat
rewona [7]

Answer:

When a disaster is declared, the Federal government, led by the Federal Emergency Management Agency (FEMA), responds at the request of, and in support of, States, Tribes, Territories, and Insular Areas and local jurisdictions impacted by a disaster.

Explanation:

3 0
2 years ago
Other questions:
  • An object having mass m is attached to a spring of force constant k oscillates with simple harmonic motion. The total mechanical
    11·1 answer
  • a person goes to his friends home at the speed of 30 km/h and comes back at the speed of 40 km/h. what was his average speed thr
    8·1 answer
  • HELP ASAP
    7·1 answer
  • A satellite is in orbit 3.110106 m from the center of Earth. The mass of Earth is 5.98011024 kg Calculate the orbital
    11·1 answer
  • 3. 500ml of 60oC water at is added to a beaker. Water’s specific heat is 4.186 J/g °C. You have 40ml of and unknown substance th
    7·1 answer
  • Le manque de sommeil peut réduire la production d'insuline par le pancréas. L'insuline est responsable de métaboliser le sucre d
    5·1 answer
  • Which has a greater speed, a velocity of +5 m/s or a velocity of −10 m/s? *
    12·1 answer
  • Need Help
    7·1 answer
  • When a car maintains a velocity of exactly 65 mph, what is it's acceleration​
    12·2 answers
  • A cubical gaussian surface surrounds a long, straight, charged filament that passes perpendicularly through two opposite faces.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!