On November 8‚ 1895 Wilhelm Conrad Rontgen‚ a German‚ accidentally came upon the x-ray. The x-ray is a complex piece of technology that airports and hospitals use greatly in life today. In the medical world the x-ray has helped find diseases when no other piece of technology could. The x-ray is a very important machine that our world couldn’t do without. Rontgen accidentally discovered the x-ray when he was studying the effects of the cathode ray. He found that the x-ray could light up a screen
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Watching television is an experience shared by most adults and children. It is cheap‚ appealing‚ and within the reach of the general public. In this way‚ TV has become an important mass media around the world. Sadly‚ this resource isn’t used in a way that people could get the best possible benefits from it. The purpose of this essay is to persuade the reader that people shouldn’t watch too much television because the content of many TV programs is not educational. Television makes people waste time
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Thermionic valves which were once used in computers‚ radios‚ and TVs were replaced by transistors. Compared to thermionic valves transistors: ~Had much smaller sizes (miniaturization) ~Much cheaper and more reliable ~Used less power When transistors were first developed they were about 0.5 cm3 in volume It was found that transistors could also be miniaturized by using silicon doped with arsenic/gallium. Several million transistors could now be placed on area of 1cm3. This had enormous consequences
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Physical Injury and Obesity Hand-held video game consoles are very popular in the developed world. While they can be entertaining‚ excessive play can be detrimental. One problem is video game addiction‚ which can be disruptive to a person’s psychological health. Other reported issues include seizures‚ neck pain‚ wrist pain and repetitive strain injury. Prolonged use also contributes to a sedentary lifestyle‚ resulting in obesity. Several studies and researches have suggested about the various harmful
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Fire alarm circuit ABSTRACT Here is a simple fire alarm circuit based on a Light Dependent Resistor (LDR) and lamp pair for sensing the fire. The alarm works by sensing the smoke produced during fire. The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the bulb will be directly falling on the LDR. The LDR resistance will be low and so the voltage across it (below 0.6V). The transistor will be OFF and nothing happens. When there is sufficient
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6 Channel Auto Reverse Sequential Disco Running Lights [pic] From 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator at a particular frequency generates the clock pulses. The clock pulses are counted by a counter and gives output after every 10 pulses. The counter drives the transistors‚ which form the triac firing circuit. The transistors fire the triacs and they provide sufficient current to the load. Decorative
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COVER An Expository Narrative on James Moor’s Seminal Essay‚ “What is Computer Ethics?” LP 2 Author‚ philosopher‚ and Professor of Intellectual and Moral Philosophy at Dartmouth College‚ Dr. James Moor wrote an essay on the relationship between computers and ethics‚ called “What is Computer Ethics‚” in 1985. This essay became the harbinger of the concept of ethics in computing. In this essay Moor states that computer ethics include: "(1) Identification of computer-generated policy vacuums
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The graph description of the table on the Participation in Selected Leisure Activities of Girls and Boys |Leisure activities |Girls age 5-14 |Boys age 5-14 | |Skateboarding or rollerblading |25 |39 | |Bike riding |58
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These advantages may not be obvious or observed in short period of times. However there are some impacts on the usage of the electronic devices and gadgets games. According to the sources from a survey of Kaiser Family Foundation‚ children are spending an average of more than 7 hours per day on the electronic device which includes television‚ electronic games‚ internet and some mobile devices. These data show that‚ kids today are easily used up more than 50 hours weekly‚ which means the time
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Watching television is an experience shared by most people. It is cheap‚ appealing‚ and within the reach of almost everyone. In this way‚ TV has become an important mass media around the world. Sadly‚ this resource isn’t used in a way that people could get the best possible benefits from it. TV has also become one of the worlds most PREDOMINANT bad habits. The purpose of this essay is to persuade the reader that people shouldn’t watch too much TV because a lot of TV programs are not educational;
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