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Questions and Answers

What happens to the potato slice placed in distilled water?

  • It loses all its water content.
  • It becomes larger and stiffer. (correct)
  • It remains the same size.
  • It becomes shorter and thinner.

    • What is diffusion?

  • Movement of particles from high concentration to low concentration. (correct)
  • The process of boiling water until it evaporates.
  • The movement of particles from areas of low concentration to high concentration.
  • A type of energy-consuming process.

    • What effect does temperature have on the rate of diffusion?

  • Higher temperature slows down diffusion.
  • Lower temperature increases the rate of diffusion.
  • Higher temperature increases the rate of diffusion. (correct)
  • Temperature has no effect on diffusion.

    • Which of the following is true about fluids?

    <p>Fluids can yield easily to external pressure.</p> Signup and view all the answers

    What will be used to visualize diffusion in water during the experiment?

    <p>Food coloring.</p> Signup and view all the answers

    What indicates that water molecules moved into the potato slice in the distilled water?

    <p>The potato slice becomes larger.</p> Signup and view all the answers

    What apparatus is required to demonstrate diffusion with hot and cold water?

    <p>Two transparent glasses.</p> Signup and view all the answers

    When a potato is placed in a salt solution, what happens?

    <p>The potato becomes shorter and thinner.</p> Signup and view all the answers

    What is osmosis specifically referring to?

    <p>The diffusion of water molecules</p> Signup and view all the answers

    What substance is used to create a salty solution in the experiment?

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

    What should you do with the first potato slice after 25 minutes?

    <p>Blot it gently on a paper towel</p> Signup and view all the answers

    How should the potato slices be placed in the petri dishes?

    <p>In the bottom of the petri dish next to their tracings</p> Signup and view all the answers

    What is the purpose of tracing the potato pieces on the Potato Activity Sheet?

    <p>To compare changes in their length after the experiment</p> Signup and view all the answers

    What does the rigidity or floppiness of the potatoes indicate?

    <p>The state of osmosis occurring</p> Signup and view all the answers

    What should be done to the salty water before using it in the experiment?

    <p>Stir it until the salt is completely dissolved</p> Signup and view all the answers

    What effect does the distilled water have on the potato slice?

    <p>It allows water to diffuse into the potato</p> Signup and view all the answers

    What happens to the rate of diffusion of food color in water as the temperature increases?

    <p>It speeds up.</p> Signup and view all the answers

    In the context of the meter bridge, what does R1 represent?

    <p>The unknown resistance</p> Signup and view all the answers

    What does the equation ρ = R1wire A/L represent?

    <p>The relationship between resistivity and resistance</p> Signup and view all the answers

    Which of the following correctly describes Archimedes' principle?

    <p>It claims that buoyant force equals the weight of the fluid displaced.</p> Signup and view all the answers

    What is the first step in verifying Archimedes’ principle using a spring?

    <p>Record the spring length in the air.</p> Signup and view all the answers

    When applying the buoyant force equation fb = ρ v g, what does fb represent?

    <p>The buoyant force acting on the body</p> Signup and view all the answers

    In calculating buoyant force, what is the relationship outlined in fb = k∆L?

    <p>Buoyant force is directly proportional to the spring's stretch.</p> Signup and view all the answers

    What does the slope of the graph between volume and change in spring length indicate?

    <p>The density of the fluid</p> Signup and view all the answers

    What does Hooke's Law state about the extension of a spring?

    <p>The extension is directly proportional to the force applied until the limit of proportionality is exceeded.</p> Signup and view all the answers

    Which variable is considered the independent variable in the experiment described?

    <p>The stretching force</p> Signup and view all the answers

    What is the correct formula to calculate the weight of the masses applied to the spring?

    <p>W = mg</p> Signup and view all the answers

    In a fair test of the spring experiment, which of the following should be controlled?

    <p>The type of spring used</p> Signup and view all the answers

    What does ΔL represent in the equation F = -k ΔL?

    <p>The extension of the spring</p> Signup and view all the answers

    Which piece of equipment is NOT mentioned as part of the apparatus for the experiment?

    <p>A digital scale</p> Signup and view all the answers

    What is the purpose of keeping the control variables the same in the experiment?

    <p>To ensure that the test remains fair and valid</p> Signup and view all the answers

    What is the significance of the limit of proportionality in Hooke's Law?

    <p>It defines the maximum force that can be applied without permanent deformation.</p> Signup and view all the answers

    What is the relationship described by Ohm's law?

    <p>Current is directly proportional to voltage at constant temperature.</p> Signup and view all the answers

    In the context of viscosity, what does Stokes's Law relate to?

    <p>The terminal velocity and resistance of a ball in a liquid.</p> Signup and view all the answers

    Which instrument is used to measure electric current?

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

    What does the letter 'ρ' represent in the density formula?

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

    How should you vary voltage when verifying Ohm's law?

    <p>By changing the electric current and recording the voltage.</p> Signup and view all the answers

    What factors must be calculated when measuring viscosity with Stokes's law?

    <p>Density of the ball and the liquid.</p> Signup and view all the answers

    What does a voltmeter measure?

    <p>Voltage across the conductor.</p> Signup and view all the answers

    Which measurement is used to calculate the slope in a magnetometer experiment?

    <p>Angle differences and cotangent values.</p> Signup and view all the answers

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