Alexander Graham Bell
1 Washing machine-
Usefulness-Having a washing machine will make you forget about Laundromats. If you buy one, you will have enough freedom to wash clothes when you need to with comfort. Describe-A washing machine (laundry machine, clothes washer, or washer) is a machine designed to wash laundry, such as clothing, towels and sheets. The term is mostly applied only to machines that use water as the primary cleaning solution, as opposed to dry cleaning (which uses alternative cleaning fluids, and is performed by specialist businesses) or even ultrasonic cleaners. 2 TELEPHONE-
Inventor- Alexander Graham Bell
Usefulness-The main advantage of telephone interviewing is from the researcher point of view. The number of different people can be reached in a relatively short period of time. From the respondents standpoint it would eliminate any discomfort that some of them would feel less uncomfortable disclosing personal information over the phone than face to face. Describe-A telephone is a device that translates one's speech into analog electrical signals, allowing them to engage in communication over extended distances. The word telephone is Greek for "far away voice". 3TELEVISION-
Usefulness-The television play a very important part in educating the people regarding the corruption, prevailing in the social and political spheres. The people can be taught not to give or take bribes. They can also be advised to help the government in curbing black marketing, smuggling, hoarding etc. During the time of election the results of the successful candidates can also be announced through the television.
Describe-It is one of the entertaining things for both adults and children. It comes in different sizes. It uses electricity. It is a box with pictures. Every house has at least one. It invented around hundred years ago and since then people have been using this...
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