Pressure and Atmospheric Pressure
18 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the unit of pressure in the metric system?

  • Pounds per square foot
  • Dynes per square inch
  • Newtons per square meter
  • Dynes per square centimeter (correct)
  • What is the formula to calculate the pressure under a column of liquid?

  • P = ρh/g
  • P = ρ/g
  • P = ρgh (correct)
  • P = g/ρh
  • What is the density of mercury in grams per cubic centimeter?

  • 15 g/cm3
  • 13.6 g/cm3 (correct)
  • 20 g/cm3
  • 10 g/cm3
  • What is the unit of pressure in Pascals (Pa) equivalent to?

    <p>1 N/m2</p> Signup and view all the answers

    What is the range of systolic blood pressure in the human body?

    <p>100-140 mm Hg</p> Signup and view all the answers

    What is the acceleration due to gravity in centimeters per second squared?

    <p>980 cm/s2</p> Signup and view all the answers

    What is the unit of pressure when ρ is in kilograms per cubic meter and g is in meters per second squared?

    <p>Newtons per square meter</p> Signup and view all the answers

    What is the typical pressure in the great veins in the human body?

    <p>3-7 mm Hg</p> Signup and view all the answers

    What is the difference between pressure and stress?

    <p>Pressure is in liquids, stress is in solids</p> Signup and view all the answers

    What is the definition of pressure in a gas or liquid?

    <p>The force per unit area</p> Signup and view all the answers

    What is the unit of pressure in medicine?

    <p>Height of a column of mercury (Hg)</p> Signup and view all the answers

    What is the equivalent of 1 atm in N/m²?

    <p>105 N/m²</p> Signup and view all the answers

    What is the peak systolic pressure in mm Hg?

    <p>120 mm Hg</p> Signup and view all the answers

    What is the formula for pressure?

    <p>P = F/A</p> Signup and view all the answers

    What is the equivalent of 1 atm in mm Hg?

    <p>760 mm Hg</p> Signup and view all the answers

    What is the term for the force per unit area in a solid?

    <p>Stress</p> Signup and view all the answers

    Why do doctors measure blood pressure?

    <p>As a part of a physical examination</p> Signup and view all the answers

    What is the unit of pressure in which atmospheric pressure is 101325?

    <p>N/m²</p> Signup and view all the answers

    Study Notes

    Pressure

    • Pressure is defined as the force per unit area in a gas or a liquid, and it is referred to as stress in solids.
    • The formula for pressure is P = F/A, measured in units of N/m² or dynes/cm².

    Atmospheric Pressure

    • Atmospheric pressure is due to the weight of the air in the atmosphere.
    • 1 atm is equal to 101325 N/m², 105 N/m², or 105 Pa.
    • 1 atm is also equal to 760 mmHg.

    Units of Pressure

    • Units of pressure can be atm, Pascal (Pa), N/m², or dynes/cm².
    • In medicine, the unit of pressure is measured by the height of a column of mercury (Hg).
    • 1 Pa (Pascal) is equal to 1 N/m².

    Pressure under a Column of Liquid

    • Pressure under a column of liquid is given by the formula P = ρgh.
    • ρ is the density of the liquid, g is the acceleration due to gravity, and h is the height of the column.

    Measurement of Body Pressure

    • Pressure is a common phenomenon in daily life, and doctors measure blood pressure as part of a physical examination.
    • The peak systolic pressure is 120 mm Hg, which is equivalent to a pressure of a liquid mercury of this height on its base.
    • The atmospheric pressure is equal to 760 mm Hg.

    Typical Pressures in the Body

    • Arterial blood pressure: 100-140 mm Hg (maximum/systolic), 60-90 mm Hg (minimum/diastolic).
    • Venous blood pressure: 3-7 mm Hg.

    Sphygmomanometer

    • Not mentioned in the provided text, but it is a device used to measure blood pressure.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Learn about pressure, atmospheric pressure, and its units. Understand the formula for pressure, and the different units used to measure it.

    More Like This

    Pressure Units and Gas Density Quiz
    18 questions
    Pressure
    40 questions

    Pressure

    RadiantHyena avatar
    RadiantHyena
    Pressure and Atmospheric Pressure
    12 questions
    Use Quizgecko on...
    Browser
    Browser