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Here's what I found on a website "Depending on which website you believe it is anywhere between 20% and 90%.
However it appears that the big difference is accounted for by the prevailing circumstances.
Conduction and convection about 25%
Radiation about 43%
Evaporation and moisture about 30%
Exhaled air about 2%
Evaporation prevails at high ambient temperatures. Conduction and convection prevail at low ambient temperatures."
The generally accepted overall amount of heat loss through an uncovered head is about 40%, which is substantial. Wearing a hat can make a big difference in how cold you get overall, and how fast you get cold.
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∙ 13y ago
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What percent of body heat is lost through your head?
I gotta go with the NY Times on this one. It would seem that it's not entirely true. Body heat escapes through any exposed surface. The larger the surface, the more heat that escapes. If you have less hair, naturally, you'll lose more heat through your head (I happen to shave mine, so I know!) http://www.nytimes.com/2004/10/26/health/26real.html
Why is kettle not 100 percent efficient?
There are many factors that affect the loss of energy:1 the resistance of the wire2 the kettle will keep most heat in but not all heat within the kettle so more energy is lost3 the water will evaporate out the top and that is also a cause. (they can't close it off otherwise the pressure would build and it would explode).
How many square feet does a 120000 BTU heater heat?
Square feet has nothing to do with how much an X BTU heater can heat, heat is calculated by determining how much heat LOSS there is to make up for. AC is the exact opposite, it's size is determined by how much heat GAIN there is. In general, a 120,000 BTU boiler can heat an average well insulated 2 story house, no problem. There are many programs that calculate heat loss/gain but since there are people who do it for a living, try asking one.
How many btu needed to heat 625 sq feet?
btus needed to heat & cool 625sf room
How many square feet does 14000 BTU heater heat?
how many square feet does a 14,000 btu heater heat
Why do you have to wear your hat on top of your head?
i think because most body heat escapes from your head.
Why do you where a hat in the winter?
You wear a hat in the winter to keep your head warm. It is not true that your body heat escapes from your head.
What percent of body heat is lost through your head?
I gotta go with the NY Times on this one. It would seem that it's not entirely true. Body heat escapes through any exposed surface. The larger the surface, the more heat that escapes. If you have less hair, naturally, you'll lose more heat through your head (I happen to shave mine, so I know!) http://www.nytimes.com/2004/10/26/health/26real.html
Difference between human head hair and body hair?
Body hair and head hair are not too much different. The hair on the top of your head is where heat escapes which makes it feel smoother. The hair on the body grows at a predetermined length.
How earmuffs work?
Earmuffs work by keeping the heat from your ears near your ears, instead of letting it escape into the air. Most of your body heat escapes from your head and feet. Covering your ears helps to warm your entire body.
What is a reason you might wear a hat?
A hat keeps you warm not only because it is additional clothing, but also because most of you body heat escapes from your head, therefore by wearing a hat, you trap more body heat in.
Where does body heat escape in a human's body?
Body heat escapes from all of your body. It escapes more in places where we sweat more often, such as the armpits and forehead. It escapes when we blush as the blood is closer to the surface of the skin so heat can escape easier.
Where does most of the heat come from in the body?
Most heat is released from the head. That is why wearing a hat is important in cold weather.
Can head shave heat up the body?
No. It does not heat up the body. On the contrary it keep your head cool by reflecting the light. Lol.
What shows heat loss in buildings?
Thermographs show how much heat escapes from certain areas of the building by showing red where the most escapes and blue where none escapes
What happens if your body cannot control the body temperature?
All of your body heat would escape and you would die of hyperthermea. Heat escapes the most through your head and feet. <><><><> Too hot, you have hyperthermia, commonly called a fever. Too low, and you have hypothermia. If the internal body temp is too low or too high, organs in your body cannot function, and you die.
Do hats retain body heat?
most of your body heat will be lost thru your head if you do not wear a hat. try it on a cold day. I think it is something like 90% of you body heat is lost thru leaving your head uncovered.
