electricity. By simply going around a home and shutting off the lights a person can decrease the cost of their electricity bill. The nationwide average for electricity is roughly $0.10 per kilowatt hour (Trent1). A compact fluorescent light bulb will use about 20 watts per bulb while an incandescent light bulb will use 50-60 watts per bulb. Leaving four 20 watt CFL bulbs on for two hours will cost about 1.6 cents. The incandescent 60 watt bulbs would cost 4.8 cents for those two hours. Some homeowners
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can go green. 1. Save energy to save money. * Set your thermostat a few degrees lower in the winter and a few degrees higher in the summer to save on heating and cooling costs. * Install compact fluorescent light bulbs (CFLs) when your older incandescent bulbs burn out. * Unplug appliances when you’re not using them. Or‚ use a "smart" power strip that senses when appliances are off and cuts "phantom" or "vampire" energy use. * Wash clothes in cold water whenever possible
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filament as a function of the filament’s temperature John Greavu Partner: Nicholas Souhleris School of Physics and Astronomy‚ University of Minnesota‚ Minneapolis‚ Minnesota 55455 9 May 2014 The black body spectrum emitted from a standard incandescent lamp was measured as a function of its temperature. Using a miniature spectrometer set‚ we have experimentally verified the Stefan-Boltzmann law to 2 in addition to getting an experimental value for k/hc. Our average value for k/hc was (66.59
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|300 Ω | Conclusion Questions: ( ½ pt each) 1. Incandescent light bulbs have a very thin filament that glows when hot. Thin filaments have very high / low resistance. 2. The 12V battery in your car operates a 25 amp car stereo. What is the resistance of this stereo system? ___________ 3. A “2D” Maglite flashlight runs on 3.0V. What is the current through the bulb if
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GENERATED IN APPLIANCES Why do some appliances produce more heat than the others? Most appliances with high power rating are heating appliances.The heating appliances has a heating element like resistors. The resistorsconvert electrical energy into light and thermal energy . It depends on the resistance of material if how much heat can be produced from electricity. Those devices who produced heat‚ the Nichrome wire is an element who is responsible for heating . when we say nichrome wire ‚ it is
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the spectrum of light emitted by a star‚ we can tell something about its average surface temperature. i) If we observe a star’s spectrum and find that the peak power occurs at the border between red and infrared light‚ what is the approximate surface temperature of the star? (in degrees C) - The approximate temperature would be 3767 degrees C ii) If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light‚ what is the surface
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when Thomas Edison first revealed the incandescent electric light bulb to understand how De Forest developed his idea. Edison ’s invention consisted of a conducting filament mounted in a glass bulb. Electricity passing through the filament caused it to heat up and created a vacuum that prevented the filament from oxidizing and burning up. In 1883‚ Edison detected electrons flowing through the vacuum from the lighted filament to a metal plate mounted inside the bulb. This became known as the Edison Effect
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LED lamp (or LED light bulb) is a solid-state lamp that uses light-emitting diodes (LEDs) as the source of light. LED lamps offer long service life and high energy efficiency‚ but initial costs are higher than those of fluorescent and incandescent lamps. Chemical decomposition of LED chips reduces luminous flux over life cycle as with conventional lamps. Commercial LED lighting products use semiconductor light-emitting diodes. Research into organic LEDs (OLED)‚ or polymer light-emitting diodes
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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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Importance of electrical services in buildings Electricity has been part of our lives. It has brought many things that surely have made many wonders and life would seem so hard without it. Electricity powers our light‚ heating‚ electronic appliances such as computers and television‚ and a host of essential services that we take for granted. However‚ electricity has much more important aspects because it is a fundamental feature of all matter. Electricity is the force that holds together the
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