Free Social Work papers, essays, and research papers.
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Implicit in its practice are ethical principles which prescribe the professional responsibility of the social worker” (British Association of Social Workers (BASW) Code of Ethics)....
Free volunteer work papers, essays, and research papers.
By displaying the flag, we express our gratitude to the generations past who foughtand died for this country, and we remind ourselves of our obligation to preserve forgenerations to come the freedom that others won for us.
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and his son, Robert, built the first practical steam locomotive. Stephenson built his "travelling engine" in 1814, which was used to haul coal at the Killingworth mine. In 1829, the Stephensons built the famous locomotive Rocket, which used a , a practice that continued in successive generations of steam engines. The Rocket won the competition at the Rainhill Trials held to settle the question of whether it was best to move wagons along rails by fixed steam engines using a pulley system or by using locomotive steam engines. The Rocket won the £500 prize with its average speed of 13 miles per hour (without pulling a load, the Rocket attained speeds up to 29 miles per hour), beating out Braithwaite and Erickson's Novelty and Timothy Hackworth's Sans Pareil. The Stephensons incorporated elements into their engines that were used in succeeding generations of steam engines.
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For centuries, man had attempted to harness the mechanical power of heat and water. As early as 200 BC, in his Pneumatica, Hero of Alexandria described a device called an Aeolipile, considered to be the first recorded . A ball containing water was mounted over a cauldron and, as it heated, two protruding bent tubes shot out jets of steam, causing the ball to spin. Many such devices were conceived in the following centuries as scientists studied the principles of , , and the properties of gasses, but these devices did not perform real work. It was not until the 18th century in Britain that the steam engine began to change not only the face of industry, but humanity's relationship to work and society.