During hot weather, sprinkling a little water on the floor can cool a room?
98511
true\nwater is a liquid. we all know that energy increases as we increase randomness. so when any liquid is converted to gas its energy increases as its randomness increases.\n\nthis increase in energy has to be supplied from outside. so when the floor is hot it has heat energy which can be used to convert the water from liquid to gaseous state.\n\nso when u spray some water it quickly evaporates utilizing the heat energy and as the heat energy reduces the room becomes cooler.\n\nthis is applicable to only the places which do not have moisture in the air otherwise there will be no evaporation and u will feel suffocation.
169875
in the right conditions and humidity
672653
Use a moist heating pad.
735810
its due to the room heating system
592913
a box fan works great a small fountain or even a fish tank with a water filter heavy curtains and rugs. also weather strip around doors and put a door guard will help on noise and cooling and heating bills.
657506
Because of all the water that gathers on the tray that supports the a/c mechanism. As air is cooled, water condenses from the air and drips down to the bottom where it gathers. Microbes that like cool moist environments will grow there. These microbes can then be introduced into the air and blown into the room.
48882
Hot air rises.\n\nThe tiles are on the floor. Ceramics can conduct and retain heat, but not so easily when that heat isn't being piped straight through them.
888199
Like a cool rain shower on a hot summer's day...
102033
It gradually cools, and can hold less moisture, therefore it rains.
479744
You don't, it just doesn't evaporate like it would in non-humid conditions.  Its all about the movement of water, and if the air is already very dense with water particles (ie. humidity) then the liquid on your skin is less inclined to enter the air.  But in very dry conditions, the water on your skin evaporates quickly and this cools you down.
334098
Hot air *can* contain more moisture than cold air, but it depends on how much moisture is available for it to contain.
1008417
Liquid air is being used for rapid cooling.
1007111
Water distributes heat much faster than air can, thus, if your are warmer, it will absorb your body heat.
669582
The body regulates our internal temperature in reference to an outside source (in this case the warm water). Your blood vessels going to your extremities are dilated, you sweat slightly more, and in some cases metabolism decreases because it produces heat. \n\nBy the way, the water does cool when it comes in contact with our body. The first thing that happens is it evaporates, because it uses the heat from our body to go from a liquid to a gas (evaporation). Then, it condenses (goes from gas to a liquid) back down to the bathtub because the air temperature is cooler than our body.
928091
In general the temperature of the water has very little impact on the temperature reduction due to evaporative cooling.\n\nAs to how cool you can get the air. If you have sufficient contact between the air and water, you should be able to approach the wet bulb temperature of the air but since the contact is not 100% efficient you will never reach the wet bulb temperature.\n\nI don't have a chart handy but you should be able to determine the wet bulb temperature that corresponds to 23% humidity.
1158724
the fan will have negligible effect, unless it can cause significant turnover in the room.  Assuming it does, the location of the fan dictates its effect.  At the top of the door, a fan would pull warm air and cycle in cool air near the floor.  The opposite would occur if placed on the floor.
43357
If the air in a room is saturated, the relative humidity for the given temperature is 100%.  If you boiled water in the room, mooisture would have to condense elsewhere in the room.  If you condense moisture from the air instead, the relative humidity would become less than 100%, depending on how much moisture you removed from the air.  If you cooled the room instead, the relative humidity would remain 100% but moisture would have to condense on the coolest surface(s) in the room.  If you heated the room instead, the relative humidity would become less than 100% (provided there is no water in the room to evaporate).  Saturation is a limit on the amount of moisture a room can hold at a given temperature.  It covers a lot of bases.