Who invented screws? How does screws work as a machine? What are the different kinds of screws?
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Archimedes is credited with inventing the screw in the 3rd century BC.  An example of a screw working as a machine is, coincidentally, the Archimedean Screw.\n\nThere are many different kinds of screws. See the second source below for some examples.
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Do visit the the following site and type the mechanism you want or the name of the machine\nhttp://www.howstuffworks.com\n\nother useful sites are\nhttp://www.answers.com\nhttp://www.wikipedia.org
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The twist drill bit is the type produced in largest quantity today. It can be used to bore in metal, plastic, wood and stone.\n\nThe twist drill bit was invented by Steven A. Morse[1] of East Bridgewater, Massachusetts in 1861. He received U.S. Patent 38119 for his invention on 7 April 1863. The original method of manufacture was to cut two grooves in opposite sides of a round bar, then to twist the bar to produce the helical flutes. This gave the tool its name. Nowadays, the drill is usually made by rotating the bar while moving it past a grinding wheel to cut the flutes.
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I'm not writing your report for you, you lazy bum. But I will give you a general idea of how blacksmiths do what they do. Blacksmithing is a trade craft, which meant that in the 1600s and stuff they had guilds for it, kind of like a group that affirmed that you were an expert at your craft.\n\nTo make horseshoes and swords, they first need to get some metal. Ore has to be refined (although they already have refined metal usually) to make sure it's pure. Then they heat furnaces to superhot temperatures and place the pure metal inside the furnaces. Bellows (air pumps) are used to make sure the metal doesn't get all screwed. Then when the metal is soft and malleable, the blacksmith will take it out (using tongs, of course) and pound it with his hammer into whatever shape he wants...nails, swords, horseshoes, etc. etc. Then he throws it in a vat of water. This instantly hardens the molten metal and makes it solid.\n\nIn older eras, like in the medieval days and the Bronze, Dark, and Copper Ages, blacksmiths had to refine their own metal. This often meant that metals were weaker, because it's very difficult to refine metal. New metals were invented like iron and steel from other metals.\n\nGood luck, hope I helped.
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Michael Farady of England created electricity through magnets. And people before him knew about electricity for long time, so its difficult to answer who invented it.
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Generally simple machines include levers, wheels and axles, belts and pulleys, gears, and inclined planes.   This site should help you.  Best of luck with it.
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Charles Babbage's engines were among the first mechanical computers. His engines were not actually completed, largely because of funding problems and personality issues. \nBabbage realized that a machine could do the work better and more reliably than a human being.\n Although Babbage's machines were mechanical monsters their basic architecture was astonishingly similar to a modern computer. \nThe data and program memory were separated, operation was instruction based, control unit could make conditional jumps and the machine had a separate I/O unit.
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hey kelly, its not an answer to ur question. Just a follow up on the one u answered for me. Spanners are acceptable...lol..thankgod u didn't think of screwdrivers !! i din't know how to reach u directly, so used the 'answer this question' method to reach u..thanx anyways...seeya around
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Try these websites:\nhttp://www.hitmill.com/computers/computerhx1.html\nhttp://www.maxmon.com/history.htm--look 2 the left\nhttp://inventors.about.com/library/blcoindex.htm\nhttp://www.softlord.com/comp/\n\nhope this helps. They might provide some information. But your best bet is to do an outline first. That way you don't have alot if information and nothing to do with it.
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The first hobbing machine built in the Hückeswagen factory called  Klingelnberg,\n\nHeinrich Schicht\nInventor of the\nKlingelnberg-Gear hobbing machine\nhttp://www.klingelnberg.info/en/company/historie.php
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The exchange of electrons between atoms, making atoms have a charge, which creates magnetism. Depending on the direction of the spin of the electrons around the nucleus, if an unequal amount of electrons spin in two different directions, there will be magnetism. \n\nMagnetism is also created by running an electric current through a particular substance, electromagnetism.\n\nAll materials have magnetism, but most are in a very minute amount.
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Computer software (or simply software) refers to one or more computer programs held in the storage of a computer for some purpose. Program software performs the function of the program it implements, either by directly providing instructions to the computer hardware or by serving as input to another piece of software. \n\nHardware is equipment such as fasteners, keys, locks, hinges, wire, chains, plumbing supplies, tools, utensils, cutlery and machine parts, especially when they are made of metal. In the United States, hardware has been traditionally sold in "hardware stores".
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its a measuring instrument to measure the outer dimensions (inner also)of objects,usually at an accuracy of 0.01mm ,also called micrometer.\nthe main part of instrument is a screw and the pitch of the screw will be .5 mm for a .01mm least count screw gauge. and one rotation of the screw is marked  into 50 divisions.\none drawback of screw gauge is the zero error.\ndue to backlation but which can be easily corrected. there are digital micrometers also in the industry now
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think pully or wrench. \nwhy do we use pully to lift things, we replace distance for force.\nbut the total work = force *distace is fixed.\nanother example when you use a pipe to make a wrench handel longer fo you can turn the screw. \nIt is technically torque but similar concept.
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a dislocation in a metal is basically a defect in the lattice.  there are 2 types of dislocations, edge and screw\n\nan edge dislocation is basically an extra plane inserted half way through the crystal lattice, with the "edge" of that plane being the dislocation\n\na screw dislocation is a shear shift in the lattice and is most easily viewed visually in a textbook
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His name was Alessandro Volta.  Alessandro Volta discovered the first practical method of generating electricity.  In 1800, he arranged zinc and copper discs in a column and invented the battery.  His most famous invention was the voltic pile. \n\nThese links should give you all the good stuff!
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Michael Faraday in 1821 was a pioneer in the field of electric motors.  He is credited with making the first electric motor, but it was more experimental than practical.\n\nBut the type of motor we see today was invented accidentally by Zénobe Gramme in 1873.