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Two materials P and Q are lowered into a trough of liquid as shown. Which of the following combinations is NOT possible when materials P and Q are mixed together and lowered into the trough again?

Two materials P and Q are lowered into a trough of liquid as shown. Which of the following combinations is NOT possible when materials P and Q are mixed together and lowered into the trough again? Correct Answer <img alt="F1 Jitendra 17-9-2020 Swati D6" src="//storage.googleapis.com/tb-img/production/20/09/F1_Jitendra_17-9-2020_Swati_D6.png" style="width: 101px; height: 56px;">

CONCEPT

  • Density: It is defined as the mass of a body per unit volume. We can also say that how much mass it can contain in a specific volume.
  • As of dense material like Iron takes more mass in a given volume than of wood.
  • Mathematically it gives a formula Density (ρ) = mass (m) / Volume (V)
  • SI Unit is kg/m3.
  • 1m3 = 1000 liters of water.
  • Flotation: It can be defined as the tendency of an object to rise to the upper levels of the fluid or to stay on the surface of the fluid.
  • Sinking: The opposite of floatation is sinking and can be defined as the tendency of an object to go to the lower levels of the fluid.

EXPLANATION

  • The flotation and sinking of an object are dependent upon the relative density with each other.
    • If the density of the object is more than the density of the liquid, the object will sink.
    • On the other side, if the density of an object is less than the liquid, then it will float over it.
    • If the density of the object and liquid is equal to each other, they are in equilibrium and float and sink both at the same time
    • Therefore, the sinking or floating of an object depends on the difference in density of objects and liquid.
  • Here in 1st case, material P is floating, it means that the density of the P is less than the density of the liquid.
  • In 2nd case material, Q is sunk in the water, which means the density of the Q is more than the density of the liquid.
  • When they are mixed together, the relative density of the material will be more than the density of the liquid. Hence they will sink in water.

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