out of 2 points | | | The Ready Light Company produces a flashlight‚ which is perfectly reliable except for two components: the battery‚ which has a random failure rate of one in every five hours of operation; and the light bulb‚ which has a random failure rate of three in every ten hours. If the company includes a backup light bulb with each flashlight‚ what is the probability that the flashlight will perform reliably for one hour (excluding light bulb replacement time‚ if any)?Answer | |
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have been many major inventions within the late 19th and early 20th century. Throughout history‚ these inventions have made great impacts on society. Three of these inventions that made the greatest impact are the telephone‚ the telegraph‚ and the light bulb. Each of these inventions has made a different impact in some way but they are still some of the greatest inventions. The telephone has left a huge impact on the world. The telephone is a device that can electronically transmit speech. Telephones
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Voltmeter • Light bulb • 9 Alligator clips • Ammeter • Test tube • Switch • Multimeter Patrick Doan 1 4.0 Method: 1. Collect all equipment and make sure the surface is clean and not wet 2. Wrap the nichrome wire around the test-tube to form a coil 3. Use the multimeter to measure the resistance of the light bulb 4. Connect the power pack to the power point but do not switch it on 5. Set up a series circuit with the ammeter‚ switch‚ nichrome wire resistor (Figure 1)‚ light bulb (Figure
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Thomas Edison and Nikola Tesla Both men were great inventors of their time and made many inventions. Tesla made the first AC motors and Edison made the first DC motors. Edison made the first incandescent light bulbs and Tesla made the first fluorescent light bulbs. Both men lived well past their 80’s. What many people didn’t know is that they were rivals. Edison had a rival in the race to develop electricity. His name was George Westinghouse‚ and he was very interested in alternating current
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Essay on Global Warming Introduction : Global warming is the term used to describe a gradual increase in the average temperature of the Earth’s atmosphere and its oceans‚ a change that is believed to be permanently changing the Earth’s climate. Even though it is an ongoing debate‚ it is proved by the scientists that the planet is warming. Global warming is affecting the nature’s balance and has a huge impact on life like continued heat waves‚ and sudden occurrence of storms
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or Long Fluorescents using plasma discharges use only 1/4 of the energy and heat of incandescent lights‚ which derive their light from heating filaments hot enough to emit visible light. If every home changed their five most used lights‚ they would save $60 per year in costs. This would also be equal to 21 power plants. The fluorescents also last up to 10 times as long. Replacing one bulb means 1‚000 pounds less CO2 emitted over the compact fluorescent’s lifetime. Traffic signal LEDs
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Converting Saltwater into Electricity I. Introduction The world we live in is abundant with food‚ life and resources‚ but we continue to use up non-renewable resources in massive amounts. As a result‚ the many nations and countries of the world will have to deal with water‚ food‚ and energy shortages‚ as an effect of overpopulation. This Project presents a new‚ derived energy source. It will also discuss the methods and ways we can utilize this environmentally-friendly resource to produce an efficient
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it battery powered. He then invented a lampback out of graphite and it made the signal clearer. Then the Western Union paid Edison $100‚000! During that time Edison invented the phonograph. In 1879‚ he invented the incandescent light bulb. Edison invented the light bulb and a lighting system for New York. In 1844‚ Mary died from Typhoid fever and 2 years later Edison married Mina Miller. Alexander Bell offered to join Edison‚ but he became enraged because he invented the phonograph. This caused
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How to save energy at Home by Sivam in Home / Interior Design 1. Turn your refrigerator down. Refrigerators account for about 20% of Household electricity use. Use a thermometer to set your refrigerator temperature as close to 37 degrees and your freezer as close to 3 degrees as possible. Make sure that its energy saver switch is turned on. Also‚ check the gaskets around your refrigerator/freezer doors to make sure they are clean and sealed tightly. 2. Set your clothes washer to the warm
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ceptions Misconceptions in Science Earth science Misconceptions 1. The Earth is sitting on something. 2. The Earth is larger than the Sun. 3. The Earth is round like a pancake 4. We live on the flat middle of a sphere. 5. Rain comes from holes in clouds. 6. Rains comes from clouds’ sweating. 7. Rain falls from funnels in the clouds 8. Rain occurs when clouds are shaken. 9. Rain occurs when clouds get scrambled and melt. 10. God
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