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 …

Gone are the days of punch cards , typeand record books , all to be replaced by the computer and the Internet . Not since the 1460 ‘s with the printing press and the 1950 ‘s and the impact of the television has one invention and its rapid evolvement been as apparent as with the …

Decisions ! Decisions : Limiting the power of search engines BY Every invention in life is nothing more than the fruits of man ‘s attempt to make life a little easier and to get the greatest possible result with the least possible effort . Machines have been designed to do much of the menial work …