Selina solutions

Selina solutions

Grade 8

Physical Quantities and Measurement | Objective Questions

Question 1

Q1) Write True or False for each statement:

  1. Equal volumes of the two different substances have equal masses.
  2. The density of a piece of brass will change by changing its size or shape.
  3. The density of a liquid decreases with increase in its temperature.
  4. Relative density of water is 1.0.
  5. Relative density of a substance is expressed in g\ cm^{-3} .
  6. When a body is immersed in a liquid, the buoyant force experienced by the body is equal to the volume of the liquid displaced by it.
  7. A body experiences the same buoyant force while floating in water or alcohol.
  8. A body experiences the same buoyant force when it floats or sinks in water.
  9. A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
  10. A body while floating, sinks deeper in a liquid of low density than in a liquid of high density.

Solution:

  1. False

  2. False

  3. True

  4. True

  5. False

  6. False

  7. True

  8. False

  9. True

  10. True

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subject-cta

Question 1

Q1) Write True or False for each statement:

  1. Equal volumes of the two different substances have equal masses.
  2. The density of a piece of brass will change by changing its size or shape.
  3. The density of a liquid decreases with increase in its temperature.
  4. Relative density of water is 1.0.
  5. Relative density of a substance is expressed in g\ cm^{-3} .
  6. When a body is immersed in a liquid, the buoyant force experienced by the body is equal to the volume of the liquid displaced by it.
  7. A body experiences the same buoyant force while floating in water or alcohol.
  8. A body experiences the same buoyant force when it floats or sinks in water.
  9. A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
  10. A body while floating, sinks deeper in a liquid of low density than in a liquid of high density.

Solution:

  1. False

  2. False

  3. True

  4. True

  5. False

  6. False

  7. True

  8. False

  9. True

  10. True

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subject-cta
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