Elasticity is a mechanical property of matter. For example, we have a 10-meter rubber piece. Now after we pulled the piece of rubber, the rubber will be lost and its original length and width. Suppose now the length of the rubber has reached 30 meters. Now we have left the rubber and if the rubber comes back to its old state then this property is called elasticity. Due to elasticity, two things are produced that is strain and stress Here the original length of the rubber was 10 meters and after applying a force it turned to 30 meters. So how much rubber has been deformed 20 meters. If we calculate a change in one meter then answer will be 2. So what is this 2? this 2 is ratio is every unit change and this ratio is called strain. Now There is a question here that when we are pulling this rubber, then it is going to be deform. Because we are pulling it but when we are leaving it, then it is going back to its original state So the question here is how did it come back, we j
Rupa is a Sanskrit word. Which means that the silver coin, which we make a knock-on peat. The bar-tar system was run in Indian Valley Civilization. Bar-tar system means to take another thing in exchange for anything. As if we have more rice and we also need wheat, then we can take some wheat for the second instead of some of our rice. But in the year 1540, the Sher Shah launched Rupai for the first time. In which 1 rupee means 1 silver coin which was equal to 178 wheat grains But after the first World War, silver and gold prices increased, then the British government denominated the Indian rupee. In which now 1 rupee means 16 aana, which was equal to 64 paise. all these copper were made of nickel. But after 1961 only the rupee was made official under the INDIAN COINAGE ACT. Now 1 rupee has been equal to 100 paise, and from July 15, 2010, we changed the symbol of rupees. Apart from India, the rupee is the currency of many countries