Ravjot's mother always squeezes water from wet clothes in the spinner of a washing machine and then uses it to clean the floor:
$(a)$ Write the principle of the technique used in the above-mentioned process.
$(b)$ Write one more application of this technique.
$(c)$ What do you learn from Ravjot's mother?

(N/A) The principle used is Centrifugation,where denser particles are forced to the bottom and lighter particles stay at the top when spun rapidly.
$(b)$ $(i)$ Used in diagnostic laboratories for blood and urine tests.
$(ii)$ Used in dairies and at home to separate butter from cream.
$(c)$ Ravjot's mother is concerned about water conservation. It shows that she cares about the environment and natural resources. By reusing wastewater,she is effectively conserving precious environmental resources.