Viscosity of Liquid
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Questions and Answers

What is the SI unit of viscosity?

  • Newton-second per square meter [N.s/m²]
  • Kilogram per meter-second [Kg/m.s]
  • Pascal second [Pa s] (correct)
  • Dyne-second per square centimeter [dyne s/cm²]
  • How is viscosity of a liquid typically measured?

  • By adjusting the density of the liquid
  • By measuring the temperature of the liquid
  • By using a stop-watch to measure the time it takes for a sphere to fall through the liquid (correct)
  • By observing the color change of the liquid
  • What is the formula used to deduce the viscosity of a liquid?

  • $rac{4}{3}πr³$
  • $rac{d}{2}$
  • $(ς - ρ) gV$
  • $6πηrv = ς gV$ (correct)
  • What does 'h' represent in the experiment procedure?

    <p>Distance between rubber bands</p> Signup and view all the answers

    What is the name given to 1 dyne second per square centimeter?

    <p>Poise [P]</p> Signup and view all the answers

    What does the slope in Equation (1) represent?

    <p>Terminal velocity</p> Signup and view all the answers

    What does viscosity describe in a fluid?

    <p>The fluid's resistance to flow</p> Signup and view all the answers

    Which physical quantity describes the viscous drag force on a sphere falling through a liquid?

    <p>Stokes' law</p> Signup and view all the answers

    What does the formula R = 6πηrv represent in the context of viscosity?

    <p>Viscous drag force</p> Signup and view all the answers

    What happens to the sphere falling in a fluid when weight goes down, buoyancy goes up, and drag goes up?

    <p>The sphere falls with constant velocity</p> Signup and view all the answers

    Which formula represents the buoyant force on a sphere immersed in a fluid?

    <p>B = ρ g V displaced</p> Signup and view all the answers

    What is the property that determines how fast or slow a liquid can flow?

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

    The viscosity of a fluid describes its resistance to flow.

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

    The formula R = 6πηrv represents the buoyant force on a sphere immersed in a fluid.

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

    The weight of an object in a fluid increases when buoyancy increases.

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

    The velocity of a sphere falling through a fluid eventually becomes constant.

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

    The buoyant force on a sphere immersed in a fluid is described by the formula B = ρ g V displaced.

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

    The SI unit of viscosity is 1 dyne second per square centimeter.

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

    The SI unit of viscosity is the poise [P].

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

    The formula for viscosity in the context of the given experiment is 6πηrv = (ς - ρ) gV.

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

    Terminal velocity is calculated by plotting a graph with time (sec) on the y-axis and distance (cm) on the x-axis.

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

    The density of the sphere can be represented using the symbol 'ς' in the equation for viscosity.

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

    The formula V= $4/3 imes πr^3$ represents the volume of the sphere used in the experiment.

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

    The viscosity of a liquid can be determined by calculating the terminal velocity of a sphere falling through that liquid.

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

    The mathematical expression for the viscous drag force on a sphere falling through a liquid is given by the law Stokes R α ηrv.

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

    The formula for the buoyant force on a sphere immersed in a fluid is R = 6πηrv.

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

    The weight of an object submerged in a fluid can be calculated using the formula W = mg = ς g V object.

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

    The velocity of a sphere falling in a fluid eventually becomes constant due to the decrease in drag and increase in weight.

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

    The formula V= $4/3 \times πr^3$ represents the volume of the small sphere used in the experiment.

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

    Viscosity is the quantity that describes a fluid's tendency to accelerate freely without any resistance.

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

    The SI unit of viscosity, pascal second [Pa s], is equivalent to dyne second per square centimeter [dyne s/cm²].

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

    The formula for calculating viscosity in the given experiment is 6πηrv = ς gV.

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

    The symbol 'ς' in the equation for viscosity represents the density of the liquid.

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

    Increasing buoyancy leads to a decrease in the weight of an object immersed in a fluid.

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

    The formula V = $4/3 πr^3$ represents the volume of the sphere used in the experiment.

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

    Terminal velocity is calculated by plotting a graph with distance (cm) on the y-axis and time (sec) on the x-axis.

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

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