A man often falls on evil days. He then generally curses his lot. False friends, that are many in number, may at that time of adversity will desert him. But the man in adversity should not lose heart.
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Elasticity of demand (and for that purpose, even elasticity of supply) plays an indispensable role in economic decisions of the community. This is because whether an economic decision is beneficial or not to the decision-maker unit depends, to a large extent, upon the elasticity of demand of the good concerned.
Mental calculations done for hours together are tiring and as such calculating machines are used for doing multiplication, division, addition and subtraction. The most important figuring jobs where calculating machines are used are:
Air contains oxygen, which is essential for life. All living things respire by breathing in air. The air we breathe in is inhaled air. The air we breathe out is exhaled air.
The machines, which make ledger posting, balancing of ledgers, preparation of profit and loss account and balance sheet, are called bookkeeping machine.
Some of the most important uses Nylon are: 1. Nylon is a high strength fibre. It is used for making fishing nets, ropes, parachutes and type cords. 2. It is used for making fabrics in textile industry. 3. Crinkled nylon fibres are used for making elastic hosiery.
The uses of Rayon are : 1. It is used in textile industry for making textiles. 2. Rayon is used for making tyre cords. 3. It is also used for making carpets and surgical dressings.
Some of the most important uses of Esters are :- 1. Esters are used for making artificial flavours and essences. These are used in cold drinks, ice-creams, sweets and perfumes.
Some of the most essentail uses of Ethyne are: - 1. Acetylene is used as the basic material for making many other organic compounds such as acetic acid, acetaldehyde, acrylic acid, etc. 2. For illumination as in hawker’s lamps. 3. For producing oxy-acetylene flame used in cutting and welding of iron.
Some of the important Uses of Thiokol are : 1. It is used for making gaskets, seals and hard rubber products to be exposed to oil and pressure. 2. Thiokol rubber mixed with oxygen releasing chemicals is used as a solid fuel in rocket engines. 3. It is used for making hoses and linings of vessels used in the manufacture of chemicals.