why do we feel cold when we are wet

The cooling down process is really quite clever. The speed of the water molecules varies from slow to fast - their Kinetic Energies cover a huge range but the temperature of the water is the Average KE. The only molecules that will leave the surface will be the ones with higher KE. When they ve gone, the average KE will be less - so COOLER! With a wind blowing over the surface, all the fast molecules are lost so it cools quicker than for no wind, when many of them will drop back in, returning their KE. Thank ewe Sohiecentaur.

This is great information and I remain ever so grateful to all the klevur peeps who help us here. What a wonderful resource.
Waking up is hard, but for some of us, getting out of the shower in the morning is harder. Things are dandy at first: You step into the basin and happily roast under a steamy blanket of hot water.

But then you shut off the shower faucet, open the curtain, and whoosh! Youвre a human popsicle. Why does stepping out from a warm shower make your bathroom feel like Antarctica? The answer is evaporation. When you step off the bathmat, the water clinging to your skin starts to evaporate. But to change into a gas, that water needs helpвnamely, it needs heat energy.

It acquires that energy by sapping heat from your surroundings. In the case of your morning shower, the evaporating water sucks up heat energy from the droplets that stay clinging to your body. The result? The water on your body coolsвand so do you. (The water glistening on your skin isnвt the only thing that gets icy. Evaporation also absorbs heat from your skin, making you shiver even more! ) Evaporative cooling may be annoying when you take a wintertime shower, but itвs handy during the stifling summer days.

Itвs what makes sweatвyour bodyвs cooling mechanismвwork. Of course, sweat doesn't always cool you down; it can be useless on a muggy afternoon. The air is so saturated with water that your sweat canвt evaporate, leaving you hot and soggy. Which explains why stepping out of the shower can be such a jolt.

The cocoon behind the curtain traps a lot of water vapor, keeping the air in the shower moist and warm. But the air outside the curtain isnвt as humid. So when you step out of the shower, you enter an environment primed to make the water on your skin evaporate quickly. Add in the fact that warm water evaporates faster, and your bathroom can feel like an icebox.