While sand is commonly used, other materials like clay or charcoal could potentially provide better cooling effects in the pot-in-pot cooler.
NCERT Book Curiosity Science Class 6
Chapter 8 A Journey through States on Water
What other material could be used in place of sand for better cooling in the pot-in-pot cooler?
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Charcoal, due to its high porosity and ability to retain moisture, can be used instead of sand in a pot-in-pot cooler. This enhances the cooling effect by improving evaporation rates, thereby maintaining a cooler temperature inside the inner pot.
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