2 .3 .1 Introduction of Ultrasound Ultrasound is simply sound pitched above human hearing . Ultrasound is the part of the sonic spectrum which ranges from about 20 kHz to 10 MHz and can be roughly subdivided in three main regions (A ) low frequency high power ultrasound (20-100 kHz (B ) high frequency , …

Carbon Steel Steel built the modern landscape that one can see today . This range from buildings , bridges , super structures , and other man-made creation that required the use of iron . The element iron is designated as Fe in the Periodic Table of Elements and it has to be made clear that …

Lead Lead has many uses . Therefore it is valuable resource mined all over the world . But just like any other substance mined and excavated from underneath the ground , lead mining causes a significant amount of pollution In the book written by Jose S . Casas , Lead : Chemistry , Analytical Aspects …

The Microwave Oven Most of the American Kitchens do not have much space to keep the oven to bake the dishes occasionally as well as having a separate microwave oven to heat edibles more quickly and easily . Most of the time people prefer having a single Microwave oven to avoid accommodation problem . Microwave …

Danny Richardson January 24 , 2007 On-line Courses The benefits of online learning are apparent as distance learning aims at meeting student ‘s needs . Effectiveness of studying process is also a matter of concern for future students . Ability to correspond with teachers and other students via e-mail , telephone and chat rooms offers …

Chapter 2 Theoretical background 2 .1 Overview of ionic liquid Ions are the main constituents of the Ionic Liquids , which are also known as ILs . Normal salt can be resembled to the ILs . Molten Sodium Chloride is one of the examples of ILs , in which the nature of the dominant force …

Nano-technologies and Nano-science It is a common knowledge that nano-technologies and nano-science are rather popular nowadays and the customer ‘s rate is swiftly growing Scientists claim that contemporary nano-technologies offer wide range of opportunities and benefits . For example , it is known that nano-technologies aim at solving many problems relating to water and air …

Copper-Zinc Alloy : An Introduction Copper in pure form has found its significant use only in electrical applications . But with the continued study of copper , the addition of other metals called alloys was developed which enhanced its various properties . Now , different Copper-based alloys were widely used in different aspects of engineering …

2 .3 .1 Introduction of Ultrasound Ultrasound is simply sound pitched above human hearing . Ultrasound is the part of the sonic spectrum which ranges from about 20 kHz to 10 MHz and can be roughly subdivided in three main regions (A ) low frequency high power ultrasound (20-100 kHz (B ) high frequency , …

Integrated Design : Electric Lawn Mower INTRODUCTION Quality must be part of the design of a product not something that has to be based from an inspection done after the design . Quality means satisfying the requirements and needs of the customer . The focus of quality is to identify the customer requirements and to …