used cheap textbooks

Identify the tool that you would use to find the length of your textbook. => a cup or a ruler or a scale..

Advantages of Using Solar Energy - It is present everywhere. It is available in plenty. It does not cause any environmental pollution like the fossil fuels and nuclear power. Solar cells last a longer time and have low running costs. In the first half of the twentieth century solar energy..

TutorVista's English tutoring program cover all grades and subject areas. The tutors keep themselves abreast with the requirements of the local school district and follow national and state standards. Our tutors use the same textbooks as used by the student to ensure..

Learn Trigonometry basics and get help with Trigonometry problems from our expert tutors. Gain a thorough understanding of Trigonometric tables and identities from our personalized, one-on-one tutoring. Our tutors undergo extensive training and keep themselves abreast with the requirements of the..

Sodium metal obtained has high degree of purity (99.5%). The starting material, sodium chloride is very cheap. Chlorine is obtained as a useful by-product..

This is illicit liquor made by improper distillation or by using methylated spirit. It is cheap and is mostly used by the lower strata of our society. It contains higher percentage of methyl alcohol, which is poisonous. Consumption of such liquor may cause blindness, ..

This process gives soda of much higher purity (99.5%). It is less expensive as the raw materials are cheap and CO 2 and NH 3 are recovered to be used again. Calcium chloride is the only waste is the solution and so no pollution problems. Formation of sodium bicarbon..

1. Bio weapons are very cheap. 2. They kill large number of people. Example: 10 gms of anthrax can kill 1.3 million people. 3. They are invisible, odorless, tasteless when released. A popular example of such bio-war is Anthrax. It was recently used by followers of Osama Bin lad..

Summary - Today most of our energy needs are supplied by the fossil fuels. In one hundred years coal will be the only one left as petroleum products may remain only for 3 to 4 decades. Little of stored energy will be left if we continue to use energy at the same rate. Fossil fuels are non..

Chemical disinfection is brought about with the use of chemical disinfectants such as bleaching powder, chlorine solution, ethanol solution of iodine and potassium permanganate. Chlorine tablets are available at cheap rates to disinfect water. A single tablet of 0.5g is sufficie..