Can someone describe exactly how it works. Why do light coats let body heat out, whereas others don't. I hear it has something to do with convection within the jacket fibers.
2006-09-14 17:18:20 · 4 answers · asked by presidentrichardnixon 3 in Science & Mathematics ➔ Engineering
A coat doesn't produce any warmth. The way a coat keeps you warm is by containing your natural body heat. Your normal body temperature is around 98.6 degrees F. That's rather hot by most standards!
So, basically our bodies are these amazing heat machines.
Most of this heat is normally dissipated through or heads and through out our body's skin (pores).
That's why it feels so good in the Summer time to be wearing nothing but shorts. All of our skin is exposed and free to dissipate our natural body heat, thus cooling us down and making us feel cooler and more comfortable.
In the Wintertime we attempt to harness all of this natural body heat by wearing lots of clothing, such as coats scarves and hats.
Same thing when it comes to our night time sleep attire. In the Winter it's long pajamas and big thick quilts and comforters, all in an attempt to trap our body's heat. In the Summer we sleep in our underwear and a thin sheet or no sheets at all, all in an attempt to vent off any excess body heat or body's produce.
Hope this answers your question and C'mon Winter.
2006-09-14 17:19:21 · answer #1 · answered by De Expert 3 · 0⤊ 0⤋
Is a thermodynamics thingy here.... Convection, Conduction and Radiation.
Radiation will be negligable though it exist. Now we only deal with convection and conduction.
Convection is highly depending on the surface area. Conduction is depending on the material properties. As you wear a thin coat, you will be expecting the heat conduction increases. But at one point if your coat is thick, then your heat loses reduces. But put in mind that there is still a heat convection. The thicker the coat is, the size of the coat greater and hence at one point this conduction and convection will be balance off. In short, you are paying for nothing.
2006-09-15 00:39:44 · answer #2 · answered by Mr. Logic 3 · 0⤊ 0⤋
When you don't wear a coat in winter, your heat dissipates into the air. Wear one and the heat is trapped next to your body. The jacket fibers affect the amount of heat trapped in depending on the density and type of fabric.
2006-09-15 00:22:38 · answer #3 · answered by Anonymous · 0⤊ 0⤋
cos it keeps heat in
2006-09-15 00:35:35 · answer #4 · answered by 4 strings 7 · 0⤊ 0⤋