SP 3404

HOW THINGS WORK:PHYSIC IN EVERYDAY LIFE

Done by:DORANENTY BINTI HAJI AWG. ABDULLAH

11B8169

HAIR DRYER

Background:• It is also known as hair blower.• It is an electrical device used to dry and style

hair.

• It uses electric fan to blow air across a heating coil; as the air passes through the dryer it heats up.

• When the warm air reaches wet hair it helps evaporate the water.

• Hair dryers may be used with a variety of brushes and combs to achieve different hair styles.

HISTORY

• In 1890, Alexandre Godefroy invented a machine to dry the hair.

• Early models• It consisted in a metal

bonnet, that attached to a chimney pipe of a gas stove, blew hot air on the head.

Early models- Vacuums Hair Blower

• First Handheld Versions• In the early 1920s, a handheld hair dryer

made from a scaled-down motor comparable to vacuum's was created in Germany. It was heavy and bulky, and it was also loud and not very popular.

Handheld hair dryers

• Helmet Dryers• Gas-heated dryers came along a decade later.

However, the heat was harmful to hair and the fumes from the gas made some clients sick, so these hair dryers quickly went out of fashion.

• Bonnet Dryers• In the late 1950s, a portable version of the

helmet-style dryer was introduced, allowing women to curl and dry their hair at home.It had a bonnet similar to a shower cap attached to the hose.

Various Hair dryers

How Does a Hair Dryer Work?

• A hair dryer needs only two parts to generate the blast of hot air that dries your hair:- a simple motor-driven fan- a heating element

Physic behind the hair dryer?

• Electromagnetism brings a blow dryer to life, by using electricity to heat and power a motor fan that consequently produces hot air.

References:

Bass, I., (2009). How does a hair dryer work? Retrieved from Happy Neews website: http://www.happynews.com/living/more-hair-care/hair-dryer-work.htm

Bloomfield, L. A. (1997). How Things Work: The Physics of Everyday Life. USA.

Byron, J. (1979). GCSE Steps in Physics. (1st ed.). Oxford (NY): Oxford University Press.

Hermes, A., (2009). The History of Hair Dryers. Retrieved from eHow Contributor website: http://www.ehow.com/about_5085397_history-hairdryers.html

Mc Coy, V. (2009). Hair Dryers. Retrieved from PowerPoint Presentation website: http://www.slideshare.net/SpringfieldEdge/victoria-mccoy-hair-dryers

Toothman, J., & O'Connell, A. M. (2000). How hair dryers work. Retrieved from 1998-2013 HowStuffWorks, Inc website: http://www.physics.org/explorelink.asp?id=130&q=hair&currentpage=1&age=0&knowledge=0&item=0