Teaching Railway Teacher PRT 2025 Mock Test Series Physics Thermal Properties of Matter Newton’s law of cooling
Why the surface of a lake is frozen in severe winters, but the water at its bottom is still at liquid state?
1
the density of water is maximum at 3 °C.
2
since the surface of the lake is at the same temperature as the air, no heat is lost.
3
ice is a bad conductor of heat.
4
none of the statements 1, 2 and 3 given above are correct.