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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
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What percent of body heat escapes from you head?
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.
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
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.
What is a part of the heat-liberating apparatus of the body?
Most heat exits the head, most of the rest is through water sweated through the skin.
What are the two ways heat is removed from your body?
Through sweat, through the top of your head, bottom of your feet, through your hands.
Where do you lose the most body heat?
You lose most of your body heat through your head. This is why cold-weather places often have extreme solutions to keep the head warm such as a scarf, scull cap, or fur headresses.
Why child's ears heat up suddenly?
body heat is released primarily through head, face, ears, hands and feet.
Explain Where does the heat warms your body come from?
It goes through Ur head and out in space for air
Where is most heat lost?
if you mean your body, it is through the top of your head, that is why it is important to wear a hat in the winter when it is freezing.
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.
How much heat can you loose through your head by not wearing a hat?
Most people would say around 20% of your body heat - so quite a lot
Where does the heat that your body gives off go?
It goes through Ur head and out in space for air
How much body heat do you lose through your head?
You lose a similar amount over any given exposed area of your body and only slightly more through the head due to a higher concentration of blood vessels close to the surface and a smaller percentage of fat. The common misconceptions are that one loses between thirty and eighty percent of body heat through ones head. The reasons behind this are two-fold. Firstly, people seldom wear hats or head-coverings until cold conditions becomes fairly acute. However, we seldom run around without clothes in all but both the hottest weather and liberal surroundings. At most points a person will have the majority of their surface area covered with clothes. If it were bitterly cold you would be unlikely to roll up one sleeve, but this would lose a similar amount of heat. Secondly, your head contains your brain. Your body protects your brain in the same way as any major organ. It withdraws blood from non-essential extremities to concentrate on the core of the body and, of course, your brain. You feel the cold in these areas last but more often than not the body will have to work harder to protect the head due to clothing on the torso and limbs as well as socks, shoes and underwear. Your head feels cold in order of essentials as well, the ears nose and then lips before the core. It is possible that you lose about thirty percent when moderately clothed through your uncovered head, but then it is also possible that your head loses less than any other area when naked due to the insulation properties of your hair.
From which three body parts do you lose most of your body heat?
hands, head and feet. about 70 to 80% is lost thru the head. the rest can be lost through the extremities. your nose is fourth in line because you respire warm air out and breath cold back in, which chills the body. James
