sp 3404 assignment 1.ppt
DESCRIPTION
How Things Work: Physic in Everyday LifeTRANSCRIPT
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¤tpage=1&age=0&knowledge=0&item=0