Physics – Density

1. What is the unit of Specific gravity?

  1. No units because it’s a ratio
  2. Newtons(N)
  3. Pascals(Pa)
  4. Kilograms(Kg)
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Answer: Option A. No units because it’s a ratio

2. Which among the following represents the Density of a material?

  1. Volume per unit mass
  2. Weight per unit volume
  3. Mass per unit volume
  4. Length per unit mass
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Answer: Option C. Mass per unit volume

3. What is the density of water at 4 degrees Celsius?

  1. Approximately 1 g/cm^3 or 1000 kg/m^3
  2. Approximately 2 g/cm^3 or 2000 kg/m^3
  3. Approximately 1.5 g/cm^3 or 1500 kg/m^3
  4. Approximately .5 g/cm^3 or 500 kg/m^
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Answer: Option A. Approximately 1 g/cm^3 or 1000 kg/m^3

4. Which of the following refers to the Specific Gravity of a liquid?

  1. It’s the ratio between weight and volume
  2. It’s about how gravity affects liquids differently
  3. It’s how specific a liquid is
  4. It’s the ratio of the density of a substance to the density of a reference substance, typically water
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Answer: Option D. It’s the ratio of the density of a substance to the density of a reference substance, typically water

5. Which of the following refers to the International System (S.I.) unit of density?

  1. Meter per second squared (m/s^2)
  2. Kilogram per cubic meter (kg/m^3)
  3. Joule (J)
  4. Watt (W)
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Answer: Option B. Kilogram per cubic meter (kg/m^3)