Thomas Edison Analysis Essay Example For Students

Thomas Edison Analysis Essay Thomas EdisonThomas Alva Edison is considered one of the greatest inventors in history. He was born in Milan, Ohio on February 11, 1847 and died in 1931. During his life he patented 1,093 inventions. Many of these inventions are in use today and changed the world forever. Some of his inventions include telegraphy, phonography, electric lighting and photography. His most famous inventions were the phonograph and the incandescent light bulb. Edison did some of his greatest work at Menlo Park. While experimenting on an underwater cable for the automatic telegraph, he found that the electrical resistance and conductivity of carbon varied accordingly to the pressure it was under. This was a major theoretical discovery, which enabled Edison to invent a pressure relay using carbon rather than magnets, which was the usual way to vary and balance electrical currents. In February of 1877 Edison began experiments designed to produce a pressure relay that would amplify and improve the audibility of the telephone, a device that Edison and others had studied but which Alexander Graham Bell was the first to patent, in 1876. By the end of 1877 Edison had developed the carbon-button transmitter that is still used today in telephone speakers and microphones. We will write a custom essay on Thomas Edison Analysis specifically for you for only $16.38 $13.9/page Order now Many of Thomas Edisons inventions including the carbon transmitter were in response to demands for new products and improvements. In 1877, he achieved his most unique discovery, the phonograph. During the summer of 1877 Edison was attempting to devise for the automatic telegraph a machine that would transcribe a signals as they were received into a form of the human voice so that they could then be delivered as telegraph messages. Some researchers had theorized that each sound, if it could be graphically recorded, would produce a distinct shape resembling short hand, or phonography, as it was known then. Edison hoped to make this concept real by employing a stylus-tipped carbon transmitter to make impressions on a strip of paraffined paper. To his amazement, the barley visible indentations generated a vague sound when the paper was pulled back beneath the stylus. In December 1877 Edison unveiled the tinfoil phonograph, which replaced the strip of paper wrapped in tinfoil. Many people would not believe what they were hearing including a leading French scientist who declared it to be a trick device of a ventriloquist. The publics amazement was quickly followed by universal approval. Edison became famous all around the world and was dubbed the Wizard of Menlo Park, although ten years passed before the phonograph was transformed form a laboratory curiosity into a commercial product. His most famous and most commonly used invention is the incandescent light bulb. American scientists including Samuel Langley needed a highly sensitive instrument that could be used to measure minute temperature changes in heat emitted from the Suns corona during a solar eclipse along the rocky mountains on July 29,1878. To please those needs Edison invented a microtasimeter employing a carbon button. This was a time when great advances were being made in arc lights so that electricity could be used for lighting in the same fashion as with small, individual gas burners. The basic proble m seemed to be to keep the burner, or the bulb, from being consumed by preventing it from overheating. Edison thought he would be able to solve this by coming up with a microtasimeter-like device to control the current. He proclaimed that he would invent a safe, mild, and inexpensive electric light that would replace the gaslight. Inventors had been attempting to devise the incandescent light bulb for fifty years, but Edisons reputation and past achievements commanded respect for his bold prediction. As a result, a group of leading financiers, including J.P. Morgan and the Vanderbilts, established the Edison Electric Light Company, and advanced him $30,000 for his research and development. Edisons idea was to connect his lights in a parallel circuit by subdividing the current so that the failure of one light bulb would not cause the whole circuit to fail. Some well-known scientists predicted that such a circuit could never be possible, but their findings were based on systems of lam ps with low resistance (the only successful type of electrical light at the time). Edison, however, determined that a

Earthquakes Subduction Zones Lab Report Essay Example

Earthquakes Subduction Zones Lab Report Essay Example Earthquakes Subduction Zones Lab Report Paper Earthquakes Subduction Zones Lab Report Paper 500 km x 100,000 CM = CM CM / 3 CM/year = years 2. Question: What is the depth of the deepest earthquake in the Tongs data set? Estimate the rate of descent of the East Pacific Rise material at the Tongs Trench in centimeters per year. Answer: The depth of the deepest earthquake in the Tongs data set is 675 km. The rate of descent of the East Pacific Rise material at the Tongs Trench in centimeters per year is 0. 312 CM/year. Work: 675 km x 100,000 CM = R = CM / years R 0. 312 career 3. Question: Estimate the rate of descent of East Pacific Rise material into the Peru- Chile Trench in centimeters per year. Answer: IOW = 45 x 100 km = 4,500 km 4,500 km x 1 O,OHO CM = 45,000,000 CM 450,000,000 km / 3 CM/year = 150,000,000 years 540 km x 100,000 CM = CM R = 1 years R = 0. 6 CM/year Interpret and Explain Data The data represents the focus depths and longitudes (owe) of the earthquakes that occur at the Peru-Chile Trench subsection zone, and the Tongs Trench subsection zone. On the Tongs Trench as longitude (0 W) increases, or moves further from the prime meridian, the focus depth also increases, or becomes deeper . This creates a steeper slope, and the line appears to be moving upwards. On the Peru-Chile Trench as longitude (owe) increases, or moves rather from the prime meridian, decreases, or becomes shallower. This creates a smoother slope that appears to be moving downwards. On the Tongs Trench graph, the best-fit line is an estimate of the location of the boundary between the Pacific Plate and the Indian-Australian Plate. The Pacific Plate is subjecting, or moving under the Indian-Australian Plate as this plate overrides the Pacific Plate. On the Peru-Chile Trench graph, the best-fit line is an estimate of the location of the boundary between the NCAA Plate and the South American Plate. The NCAA Plate is subjecting, or moving under the South American Plate as this plate overrides the NCAA Plate. The Peru-Chile Trench and Tongs Trench have similar earthquake focus depths (km), but the longitude (owe) of these earthquakes is different. Summary of Data As two tectonic plates converge, if one or both of the plates is an oceanic lithosphere, a subsection zone will form. The Tongs Trench has a steeper profile than the Peru-Chile Trench. This is because older crust is cooler and denser than younger crust therefore it subjects at a steeper angle. The Tongs Trench has the steeper and older material. As observed from the charts, the Tongs Trench has a steeper profile than the Peru-Chile Trench. This means that the crust at the Tongs Trench is older and denser than the crust at the Peru-Chile Trench, therefore it subjects faster and at a steeper angle. The density of the rock that makes up the subjecting plate determines they way in that a plate behaves. A plate with a greater density subjects into the mantle faster and at a steeper angle than a plate with a lower density. The age of the crust involved in the subsection also affects the rate at which it subjects. Older crust is cooler and denser therefore it subjects at a steeper angle and faster than new crust at a subsection zone. Conclusion: Check Your Hypothesis: My data supports my hypothesis. I predicted that the East Pacific Rise material at the two convergent boundaries: the Tongs Trench and the Peru-Chile Trench is older than the crust created at the East Pacific Rise but the Tongs Trench material is older than the Peru-Chile Trench. This is true because the Tongs Trench and Peru-Chile Trench will have older material, as they are further away from where the crust is created. In addition, it is true that Tongs Trench has older material than the Peru-Chile Trench because it has a steeper slope, which means it is older and denser. Errors and Fixes: In this lab report, I researched more on my background information to enhance my understanding of the topic. In addition, I explained and analyzed my data to make it easier to understand the trends and what the data actually means. I also provided instructions on using a table of data, setting up, and preparing a graph, and preparing a lab report. The errors I had in my lab report were with the math work on the first three analyze questions, the direction in which the plates subjected, and my hypothesis did not clearly state an answer to my question.

International ACCOUNTING and Finance Essay Example | Topics and Well Written Essays - 2500 words

International ACCOUNTING and Finance - Essay Example Unfortunately, the current method of costing has resulted to a drop in the profits of the company. Upon interviewing the present accountant, he admits that the old system is wanting but insist on continuing this cost accounting system because of the ease of computing the total factory overhead costs. The following paragraphs will dissect the current full cost accounting system and Davina’s recommendation that the activity based costing be immediately set up. The per machine hours method using 6,500 hours is better than the per direct labour hours method using 150% of direct labour hours (150% x 4,000 hours = 6,000 hrs) in recovering overhead costs. The above analysis of variances shows that the per hour cost of machine is lower under the direct labour hours method as compared to the direct labour by â‚ ¤4 per hour. Also, the Set up costs under the machine hours method shows that the per machine hour cost of â‚ ¤31 per hour is definitely lower than the per hour cost using the direct labour hours method amounting to the higher â‚ ¤33 per hour. Finally, the materials handling cost under the machine hours method amounting to only â‚ ¤18 per hour is definitely lower than the per hour cost of â‚ ¤20 per hour using the direct labour method. Method above shows that activity based costing gives us increase cost per hour. The standard products above shows that the per hour cost (blue color) above shows that the cost using machine activity cost driver unit is â‚ ¤ 79.86 per machine hour. And, overhead cost based on number of setups is â‚ ¤ 2,502.20 per set up. Likewise, overhead computation based on materials handling costs is â‚ ¤747.50 per materials handled. The specialized products computation above show that the cost per machine is â‚ ¤93.17 per machine hour. Also, the overhead cost based on the number of set up is â‚ ¤ 1,001 per set up. Likewise, the overhead costs based on materials handling is â‚ ¤398.57.