Water Pressure and Volume Relationship
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Questions and Answers

What is the pressure at a depth of 150 meters?

  • 2 Bars
  • 2.5 Bars (correct)
  • 3 Bars
  • 1.5 Bars
  • If the volume of a balloon at the surface (1 Bar) is 4 L, what would be its volume at a depth of 200 meters?

  • 2 L (correct)
  • 1.33 L
  • 0.75 L
  • 1 L
  • What is the density of air at 300 meters depth?

  • 2.5 kg/L
  • 3 kg/L
  • 5 kg/L
  • 4 kg/L (correct)
  • What volume of water would displace a buoyant force of 1.85 kg at 100 meters depth?

    <p>1.85 L</p> Signup and view all the answers

    Which statement about the relationship between pressure and volume is correct?

    <p>As pressure increases, volume decreases.</p> Signup and view all the answers

    At a depth of 66 feet, how much atmospheric pressure does a diver experience?

    <p>3 atmospheres</p> Signup and view all the answers

    How much air does a diver use at a depth of 66 feet compared to the surface?

    <p>125%</p> Signup and view all the answers

    What happens to the volume of air in a diver's lungs when they descend to a depth of 33 feet?

    <p>Decreases by 50%</p> Signup and view all the answers

    If a diver descends to 30 meters (approximately 98 feet), what will happen to their 1 liter of air when it compresses?

    <p>Compresses to 250 ml</p> Signup and view all the answers

    What are some potential effects on a diver due to increased water pressure at depth?

    <p>Discomfort in ears, difficulty breathing, and sinus pain</p> Signup and view all the answers

    Study Notes

    Water Pressure

    • The absolute pressure at the surface is P0, and it increases by 1 Bar for every 10 meters of depth.
    • The volume of water remains constant at 1 L for every depth, and the density remains the same at 1 kg/L.

    Boyle's Law

    • PV = constant
    • n, the number of moles, remains constant, making the quantity of water constant.

    Gas Compression

    • As pressure increases, volume decreases.
    • Density stays the same for every depth.
    • According to Boyle's Law, PV = constant, and n, the number of moles, remains constant.

    Balloon Example

    • A 4 L balloon filled with 3.7 L of air is affected by pressure changes at different depths.
    • At 100m, the pressure is 2 Bars, and the volume is 1.85 L.
    • At 200m, the pressure is 3 Bars, and the volume is 1.23 L.
    • At 300m, the pressure is 4 Bars, and the volume is 0.93 L.
    • At 400m, the pressure is 5 Bars, and the volume is 0.74 L.

    Buoyancy

    • A buoyant object will float to the surface, but will sink if anchored or tied to a weight.
    • Buoyancy force can be calculated based on the volume of the object.

    Diving

    • Increased water pressure affects the body, requiring divers to deal with the pressure.
    • As you descend, air volume decreases, and pressure increases by 1 atmosphere every 10 meters or 33 feet.
    • This means that at 33 feet, you will experience twice the weight of the atmosphere, equivalent to two cars on top of you.

    Air Volume and Density

    • Water does not compress, but air does, causing the volume of air to decrease with depth.
    • As you descend, air compresses until it reaches a point where it doesn't compress anymore.
    • Air will always change its volume according to the surrounding pressure.

    Diving Risks

    • If you don't equalize your ears, you might experience discomfort and injury due to the pressure change.
    • The deeper you go, the more pressure on your lungs, requiring deeper breathing to get the same amount of oxygen.
    • This affects air supply, causing you to exhaust your air supply quicker.
    • You will use 113% of air for a 33-foot descent, and 125% for another 33-foot descent.

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    Description

    This quiz explores the relationship between water pressure and volume at different depths, including the effect of pressure on density.

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