Question

We know that kinetic energy is directly proportional to temperature so when we spin water in speed kinetic energy increases so temperature will increases. Then why water became cool when we spin it in speed???

Answer 1

Near the edges of a container containing the hot water, the heat is exchanged to the outside. The air takes some of the heat away at the bottom and sides of the cup allowing the localized liquid to cool down. As the difference in temperatures between the surroundings and the liquid goes towards equilibrium, the rate of heat transfer (the rate at which it cools down) slows.

Stirring or spinning the hot water allows the liquid present inside the bulk of the container to come in contact with the edges of the container, and hence with the sorrounding air easily and thus leading to lowering the temperature of the total volume of hot water.

HOPE IT HELPS....☺☺....

Answer 2

Hello !
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Yes K E α T 
When kinetic energy(motion of particles or molecules ) increases then temperature increases but in case of water the state of water in its liquid means liquid H2O have more pressure and temperature then the solid H2O have if u constantly spin in water it will lead to motion of its particles but here evaporation also occur which leads to the cooling effect. As atmosphere takes some heat away and the heat present in atmosphere plus the heat releases by water is not equal which comes to equilibrium and water remains cool.