WAEC Physics questions: Liquids at rest

11 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Liquids at rest· WAEC

   A substance has a relative density of 2.7. This means that it is

   • A2.7 kg in mass
   • B2.7 times lighter than water
   • C2.7 times as dense as water
   • D2.7 times as dense as air

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2. Question 2· Liquids at rest· WAEC

   A ship floats higher in sea water than in fresh water because sea water

   • Ais deeper
   • Bis warmer
   • Cis denser
   • Dhas waves

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3. Question 3· Liquids at rest· WAEC

   A body weighs 50 N in air and 30 N when fully immersed in water. Find the upthrust on it.

   • A80 N
   • B20 N
   • C30 N
   • D50 N

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4. Question 4· Liquids at rest· WAEC

   A stone weighs 0.6 N in air and 0.4 N in water. Find its relative density.

   • A3
   • B1.5
   • C0.33
   • D2

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5. Question 5· Liquids at rest· WAEC

   The relative density of the body above (10 N in air, 6 N in water) is

   • A2.5
   • B1.67
   • C0.6
   • D4

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6. Question 6· Liquids at rest· WAEC

   A body floats in a liquid when its weight is equal to the

   • Aupthrust on it
   • Bvolume of the liquid
   • Cmass of the container
   • Ddensity of the liquid

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7. Question 7· Liquids at rest· WAEC

   A body floats in a liquid when

   • Aits weight equals the upthrust on it
   • Bits weight is greater than the upthrust
   • Cit is denser than the liquid
   • Dit has no weight

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8. Question 8· Liquids at rest· WAEC

   A body weighs 10 N in air and 6 N when fully immersed in water. The upthrust is

   • A6 N
   • B16 N
   • C4 N
   • D10 N

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9. Question 9· Liquids at rest· WAEC

   The relative density of a substance of density 2,700 kg/m³ is

   • A2.7
   • B2,700
   • C0.27
   • D27

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10. Question 10· Liquids at rest· WAEC

    A hydrometer sinks deeper in a liquid that is

    • Aless dense
    • Bmore dense
    • Chotter
    • Dcoloured

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11. Question 11· Liquids at rest· WAEC

    By the law of flotation, a floating body displaces

    • Ahalf its weight of the fluid
    • Bits own volume of the fluid
    • Cits own weight of the fluid
    • Dmore than its own weight of the fluid

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