Jung e Neherwaan aur Khawaarij ka Khaatimah || By Hafiz Javeed Usman Rab...
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Why We Need Computers?
It is usually said that we are living in the age of computers. You might see computers in homes, government and non-government organizations. You will observe that in our day to day work routine how much depends on computers. Almost all over the world, the utility bills (i.e. gas, electricity and telephone bills) are prepared by computers. Suppose you are doing shopping, suddenly you need money but your money is kept in a bank which is far away from the market. The question is how you will manage to get money from the bank. Some years back, it was impossible to get money from a bank account without going to the bank. But now computers make it possible. You might have a cash machine. This machine provides you with the facility of doing banking without going to the bank. Most of the shopping malls provide a facility to accept credit card instead of cash. All is about through computers... Another example is that you have watched cartoons. In past hundreds of drawings made for a moment of ...
Importance of Water
There is the importance of water in living things. Water is the medium of life. It is the foremost overabundant compound all told living things. Its amount of living things varies from 65 to 89%. Human tissues contain about 20 per cent of water in bone cells and 85 per cent in brain cells. Water has these significant properties. it's the importance of water. 1. Solvent Property Due to its polarity, water is an excellent solvent for polar substances. Ionic substances when dissolving in water, dissociate into positive and negative ions. It's another importance of water. 2. Heat Capacity There is another importance of water that it had a great ability of absorption of heat. The specific heat capacity of water the number of calories required to raise the temperature of 1g of water from 15 to 16 C is 1 calorie. Because much energy to require to break down hydrogen bonds. 3. Heat of Vaporization Water absorbs a lot of heat because it changes from liquid to gas. The heat of vaporizati...
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