Hair hygrometer!!???

Question

From which country are the people whose hair is best suited for making a hair hygrometer?? Why is the people from that country best suited for it??
EASY 10 POINTS!

Answer 1

For making a hair hygrometer you need a thin , long and straight hair. A blonde hair is thinner than the black hair.
The cross section of the hair should be round. The cross section of the black (*****) hair is elliptical. The thickness of ordinary European black hair (which cross section is round) is about 40 microns. The thickness of the hair taken from a blonde girl is about 10 to 15 microns. ( one millimeter is 1000 microns !).
The blonde hair to make a hygrometer should be also long and straight. Younger women and girls (blondes) from Germany, Holland, Russia and Scandinavia may provide good quality hairs to make hygrometers.

If you want to make a hygrometer, please use ether to clean the oily substances being on the hair. Ether is a very good chemical to absorbe fats and oils.

Put the (cleaned) hair around a spool having (about) 20 mm diameter ; attach a weight about 5 to 10 grams to the one end of the hair; attach the other end of the hair to a fix point;
Attach a needle on the spool as a pointer; Voila!.
Now you have a hygrometer!
(Obviously the spool must have a shaft)

When the relative humidity of the room changes, your pointer will move.( As the humidity increases, the hair gets longer and the spool revolves). If you cut a round thick paper and stick it on an appropriate place , you can mark the movement of the pointer (needle) as the relative humidity values.

Answer 2

Scandanavian hair (i.e. Swedish)

The hair must be of low melanin content (i.e. blonde) and relatively coarse to be effective as a moisture attractor.

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