g what mass of water must evaporate from the skin of a 70.0 kg man to cool his body 1.00 C? The heat of vaporization of water at body temp

The correct answer will be "100.7 mL". The further explanation is given below.

Explanation:

The given values are:

Temperature,

ΔT = 1°C

Mass,

m = 70 kg

c = 3.480 J/Kg.K

Amount of released heat will be:

⇒  

On putting the estimated values, we get

Let M will be the amount of evaporated water at the temperature of 37°C.

Required heat will be:

⇒  

Now, Lost heat will be equal to the required amount of heat.

⇒                          

On applying cross-multiplication, we get

Now,

⇒  

On putting the estimated values, we get

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on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.