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DESIGN AND FABRICATION OF A HAIR DRYER
ABSTRACT
A hair dryer is an electromechanical device designed to blow cool or hot air over damp hair, in order to accelerate the evaporation of water particles and dry the hair. Hairdryers allow to better controlling the shape and style of hair, by accelerating and controlling the formation of temporary hydrogen bonds inside each strand. These hydrogen bonds are very powerful (allowing for stronger hair shaping than even the sulfur bonds formed by permanent waving products), but are temporary and extremely vulnerable to humidity. They disappear with a single washing of the hair.
Hair dryer use coils of wire that have a high electric resistivity and heat rapidly with an electric current. A fan (usually powered by a universal motor) blows ambient air past the hot coils resulting in heated air effective for drying. The heating element in most dryers is a bare, coiled nichrome wire that is wrapped around insulating mica heating boards. Nichrome wire is used in heating elements, because of two important properties: it is a poor conductor of electricity and it does not oxidize when heated.
Title Page———i
Certification——–ii
Dedication———iii
Acknowledgement——-iv
Abstract ———vi
Table of Content——–vii
Chapter One
1.0 Introduction ——-1
1.1 Statement of Problem——4
1.2 Purpose of the Study——5
1.3 Significance of Study——8
1.4 Limitation——–9
1.5 Scope of Study——-11
Chapter Two
2.0 Review of Related Literature —-12
2.6 Summary of Literature Review—- 19
Chapter Three
3.0 Research Methodology and Procedure—22
3.1 Population ——–22
3.2 Sample and Sampling Technique—-22
3.3 Validation of the Instrument —-23
3.4 Reliability of the Instrument —–23
3.5 Data Analysis——-23
Chapter Four
4.0 Presentation and Discussion of Result—24
4.1 Analysis and interpretaion of Data—25
4.2 Discussion of Results——38
Chapter Five
5.0. Summary, Conclusion, and Recommendation –40
5.1 Summary——–40
5.2 Conclusion——–41
5.3 Recommendation——42
References ———45
Appendix 1——–47
Appendix ———50
DESIGN AND FABRICATION OF A HAIR DRYER
