why windchill makes people feel colder but has no effect on the temperature of a water pipe?
106276
I have to disagree with bobpegoh.  Wind chill DOES change the actual physical temperature of anything that has moisture. Nor is it a matter of simple heat transfer, although that can come into play.\n\nThis is the basic answer to your question - your skin has moisture but the outside of the pipe (where the wind hits) is dry.  If on a windy day you were to put something that absorbs water easily outside, you would feel the item cool in the wind.\n\nThe chilling effect is caused by evaporation (see the link below).  The physics is complicated, but basically when the humidity is below a certain point, water will evaporate and use some of the heat energy in your skin to accomplish that.\n\nPractical exercise.  Take a small wash rag and get it wet, squeezing out excess water.  Swing the rag  in a circle as fast as you can for a minute or so.  When you stop, the rag should be noticeably cooler than when it started.\n\nHow much of the heat energy depends on the relative humidity* - as the humidity gets lower, it takes less energy for the water to evaporate, so it doesn't cool down as much.  When the RH gets higher, evaporation will take more energy until the point where there is too much humidity and the water stops evaporating altogether.\n\nRelative humidity and evaporation are a critical part of our bodies ability to regulat heat.  Our bodies actually generate quite a bit of heat just on normal stuff like breathing and circulating blood, and without a way to cool down, our bodies would overheat.  One way we do this is to take advantage of evaporative cooling by sweating.  Wind increases the cooling and blows warmed, humid air away from our body.  \n\nThis is why weather people talk about "heat index" - when the temperature and  humidity get high, our bodies can't dump the excess heat without help.  The heat index is a comparison of how easily our body can dump heat at the current temperature and humidity vs. the current temperature and a standardized humidity.
527660
our bodies constantly generate a lot of heat because of our metabolism. So we have to constantly lose heat to maintain our normal temperature. \n\nIf you put a bucket of warm water outside, and that warm water just happened to be 98.6 degrees Fahrenheit, but the outdoor temperature was 85 degrees Fahrenheit, the water would cool down. That's because the outdoor temperature, while still warm, is cooler than the temperature of the water. Heat naturally flows from warmer places to cooler places. The heat's "goal" is to reach equilibrium–a state where everything is the same temperature as everything that surrounds it. That's why a hot bowl of soup or a cold glass of soda will eventually reach room temperature if you leave them out long enough.\n\nThe difference between you and a bucket of water (well, one of many differences) is that your body is constantly generating more heat. All that heat has to go somewhere, so it tries to escape through your skin. The greater the difference between the outside temperature and the temperature of your body, the faster that heat will escape. That's why you'll feel much cooler on a 60-degree day than on a 90-degree day.
626721
because the moving are increases the rate that perspiration evaporates off you skin, which makes you feel cooler.
133353
I think it's the colder the better. messed around with water cooling (quieter) for a while, haven't done any overclocking for ages though so knowledge a bit sketchy
1046860
No, you'll just be less likely to realize it because the wind will make you feel a little cooler.
221941
your breath is warm compared to cold temperatures
69181
To answer your question simply - \n\nWind chill measures HOW FAST the object loses its heat energy due to the wind - however, it will not remove more energy than is in the wind - but it will quickly reduce the temperature of an object to the actual temperature of the wind. On a person, the loss due to evaporation will make it feel colder. However, on an inanimate object, such as water, It's not going to affect the core temperature, and therefore, it will not aid in the production of snow.\n\nOn a side note - the snow machines are made to produce snow at temperatures higher than 32, because part of their job is actually to remove energy from the water. So, they probably work regardless of the temperature - however, once the snow is on the ground, higher temperatures might cause it to melt sooner.  Snow can be made at temperatures higher than 60F - People do it all the time - X Games, movies, snowboarding stunts in the middle of summer. The actual temperature that snow could be made would be based on the ratings of each snow machine, and how much energy it could actually remove from the water.
578304
No, it is not loss of body heat. It has to do with the change in stimulation of the cilia and surface nerves in your rectum. Think about that loss of body heat idea... it doesn't really make sense. Let's say you have a cup of water at 100 degrees. Taking away any external factors, if you pour half of it out the water left in the cup is still 100 degrees.\n\nI should add that this phenomenon you're talking about is known as the "poop-shakes" and there is a theory that claims that people who have the "poop-shakes" (not everyone experiences them) are more likely to derive pleasure from anal sex.  Happy humping!
580978
im in wisconsin and it is like 87 but it feels like 102 and i think the humitaty is like 100% because u cant breath.  it sucks because we havent turned on our air conditioning
1118061
Warm water increases blood flow, and if you prefer cold showers the cold water is stimulating. Also the smell of the soap no matter how light is somewhat therapeutic. There's also the feeling of washing away problems,stress, anger, and all negative things down the drain.
408671
its not like that , but according to HVAC data , the temp. underground is constant about 10 degrees celsius , so in summer its hot , then we find the water cooler , and in winter , the air temp. may be zero , so the water is hotter
7315
Psychological desire to get a temperature contrast when coming in from outside (cool down in summer, warm up in winter)\n\nAnd humidity. Insisde air is more humid in summer, so same temperature feels hotter.
1089658
Not necessarily evaporation of sweat.  It is the removal of ambient heat being put off by your body.  On a very cold, but not windy day, you can stand outside without a shirt on and feel somewhat comfortable.  The heat of your body is radiating into the air around you and staying there.  If the wind is blowing, then it is taking heat out of your body faster and making you feel cold.
394186
No, wind is caused since warm ail is less dense than cold air. cold goes to warm, causing wind. If all air was the same temperatureair would sit still unless something moved it (fan etc.)
821715
It depends. Wind is the movement of air. If the wind contains warm moist air, then yes the temperature and humidity will be affected. It temp and humidity of the air in the wind is the same as the air it replaces then no there will be no effect.
758705
Contrary to what is believed, alcohol may make you feel warmer but it actually lowers the temperature of the body. When alcohol enters the blood, it causes the blood vessels to widen.  More blood flows to the skin's surface.  The drinker's body temperature drops as the increased blood flow to the surface allows body heat to escape.  People who drink alcohol in cold weather to get warm actually accomplish the opposite.\n\nThough carbohydrates are known to be the best source of heat and energy, all what you eat are actually contributing in producing your body heat. So eat a well balanced diet and wear sufficient clothing to combat coldness while you go out. Instead of bringing a flask of scotch on route why not bring a flask of hot drinks instead?☺
764613
well, i like the cold and i would like to experience that once, just to see how it feels.  I live in Virginia and the coldest windshill I have seen is around -15 degrees C and i was wrapped up and i wasn't even cold.  If you are referring to the celcius scale, i really wouldn't mind it.  I probably can handle that better than the high heat.  It is 25 degrees C today and i am jealous of you.  It is hard to get in the christmas spirit when it is warm outside. I want snow.