My Study Club

What are Significant Figures? The reliable digits in a number that are known with the certainty are called significant figures. The last digit of measured number is generally considered uncertain by ± 1. For Example :  0.0112g contains three S.F and uncertainty is ± 0.0001 mg. 11/2mg contains three S.F and uncetainty is ± 0.1mg. The uncertainty and the number of S.F do not change when measurement is expressed in sub units. For Example: 0.0112g = 11.2mg in 0.0112g uncertainty is ± 0.0001g and in 11.2 mg uncertainty is ± 0.1mg as 0.0001g = 0.1mg. Therefore uncertainty and number of S.F do not change. Number Of Significant Figures (Digits) Depends Upon : The accurancy of the measuring instrument. The size of the object to be measured. In any series of measurements, the measured numbers are obtained to a certain degree of precision. The precision of measured is indicated by the number of significant figures. Precision : How close a series of measureme

I woke up one morning in July last year. The weather was fine. My school started at 7:30 in the morning. I took my breakfast and went to the Bus Stand. The wind began to blow harder. Gray and dark clouds began to approach from the north. Before we reached the school it grew dark. Ran began to fall in torrents. Somehow I reached the school. I was drenched to the skin. My clothes were dripping, I presented ridiculous appearance. However, I got consolation when I saw that my school fellows had fared no better. The Head Master circulated a notice that the school was closed for the rest of the day. But we could not go back home as the rain was still falling heavily. Thundering and lightening were producing horrible noise. It looked as if there was a general bombardment all around. At last the rain stopped for some time about three hours. I came out of the school. There was another shock in store for me. There was water on Bunder Road. I waded in the water and the water rose to my hip

Islamic way of life is the complete beneficial way of life. Islamic way of life is necessary for all the nations. The nation can change the sorrows, darkness and drwabacks into happiness and prosperity with the help of Islamic way of life. Islamic way of life provides the better guidance in every aspect of life. Islamic way of life makes us true Muslim, confident, honest, man of priniciple, incorrupt, selfless, literate and paintaking. Now a days an Islamic of life is an essential code of life in the world. Everywhere we dupes, corruption, blind, fath, sins, disobediency, husmoney, murders and terorism increasing day by day. Therefore, its necessary to establish an Islamic, one unit Government system for the whole nation where we can get the rid of every end of evil. I like the most an Islamic way of life than other government system. We should establish an Islamic government as own unit system. We should act upon the Islamic teaching.

Chemistry has the task of investigating the materials of which the universe is made. It is not concerned with the forms into which they may be fashioned. For example the composition and structure of rubber is of really significance as compared to the shapes into which this has been fashioned like pipes, tyres and sheets etc. The materials are constantly undergoing chance in nature. For example, iron rusts, spirit evaporates, quickly, coal burns, animals digest their food,plants synthesize their own food materials and so on. Chemistry investigates such changes - The conditions under which they occur, the new substances that are formed as their result, and the energy that is absorbed or liverated by them. Chemistry also studies the way in which similar changes can be brought about in the laboratory and on a large scale in industries. As a result of investigation along these lines, chemistry has found how metals can be extracted from their oresm how infertile fields can be made fertile