Documents about Incandescent Light
10-29-08
Allegheny, ECON 290
Excerpt: ... Entrepreneurship I Quiz Notes 10/29/08 Parts of Unions plan Boost sales Switches to commission based approach Replaces 11 people Corrugation is too narrow Quality is bad She does hands-on original research Poor quality of paints Outsourcing Long lag time between resupply times She keeps after Lowes by getting the business She goes store by store to build the business back up Animal containment facilities (barns) She moves on up to roofing (where margins are higher) How does she manage her empire How she manages the weekly reports She checks in with managers once a week in person Very successful Growth focused Opportunity focused Edison one of the most famous inventors Phonograph Incandescent light bulb Improved on telegraph Improved on telephone Who was on his team Most significant thing his research lab What about his team/? He is brilliant in chemistry, physics, mechanics, etc. One thing he got messed up on: Math ...
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LO1-Lec2-I
Doane, LO 1
Excerpt: ... File LO1Lec2 Lecture Content and Activity Notes: Start with classical E&M field and showed the total E&M spectrum and the very small region of visible light in the whole thing. Using f = c relationship showed that E=hc/ . Do the calculation for 550 nm light, which is the peak sensitivity for a typical human being. The answer of about two electron volts is then discussed as the order of magnitude for optical processes. Compare this to thermal processes (room temperature is only about 0.02 eV) and chemical processes which are typically tenths of an eV. Show a dim incandescent light bulb and turned it up bright to show that even as a bright light it would not discharge a charged electrometer. Showed Planck's law fit to the data. Do the Photoelectric demo again and show the influence of glass on the UV light source. light as photons. Show three gas tube light sources and distribute good diffraction gratings for the students to use to look at the spectra. Show the Balmer series and discuss th ...
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Exam 2 quiz problems
Penn State, EGEE 102
Excerpt: ... tor operates for 15 hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is $0.11 per kWh? Annual operating cost = 198 / 1000 * 15 * 0.11 * 365 = $119.2455. Highly energy efficient appliances have an Energy Star label. Calculate the amount of heat energy required to heat 126 lbs of water from 62oF to 121oF. Amount of heat energy required = 126 * (121 - 62) = 7434 BTUs. Calculate the amount of heat energy required to heat 185 lbs of water from 61oF to 134oF. Amount of heat energy required = 185 * (134 - 61) = 13505 BTUs. For most efficient operation, keep the freezer filled to capacity. Chapter 6 (10) A 120 watt incandescent light bulb is operated for 6 hours, and a 15 watt fluorescent light bulb is operated for the same period of time. At 8 cents per kWh, what is the cost savings of the fluorescent bulb? Energy consumed by Incandescent light bulb = 120 / 1000 * 6 = 0.72 kWh Energy cost for Incandescent light bulb = 0.72 * 8 / 100 = $ 0.0576 (round up to $0.06) Ene ...
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lecture20handout
George Mason, PHYS 103
Excerpt: ... t in a typical bulb is 0.5 m of 25 micron coiled up into a length of 2 cm Filament lifetime tungsten atoms sublime filament gets thinner with time inert gas added to prolong life but gas adds to convective heat loss (total efficiency is 10%) dark spot at top of bulb is actual tungsten atoms 3-way Bulb Larger filament has greater surface area so it radiates more power 3 Test your understanding If you remove the gas in an incandescent light bulb, will it become more efficient, less efficient, or stay the same When you operate a 50-100-150 W bulb at its lowest setting, it emits yellow-white light. If you use a dimmer switch to operate a regular 150 W bulb on only 50 W electrical power, it emits orangeish light. Why? Main Points from Today's Lecture Thermal Radiation You should understand that all things radiate electromagnetic waves (or light). Light comes in different "colors" (wavelengths). The hotter the object, the greater the power of radiation emitted and the shorter the wavelength at ...
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X-Ray Diffraction
Wisconsin, ME 240
Excerpt: ... are generated g. Heavy elements are more efficient producers of x-rays than light elements F. Other notes from Part 2 a. General Wavelength of x-rays: 10^-6 to 10^-10 cm b. Time-line of X-rays Part 3: The Generation of X-Rays and X-Ray Spectra A. Generation of X-Rays a. Electrons are boiled off a heated tungsten filament (similar to the operation of an ordinary incandescent light bulb) b. The large voltage placed between the metal focusing cup and the tungsten filament quickly accelerates electrons towards the focusing cup c. Some of the electrons pass through he hole in the focusing cup where they then travel a short distance to the target d. Along with a great deal of hear, x-rays are generated when the accelerated electrons strike the metal target e. X-rays then pass out of the x-ray tube through beryllium windows, that are transparent to x-rays, to be used in diffraction studies B. The Two Methods of Generating X-rays a. Involves collisions between accelerated electrons and the nuclei of the atoms of ...
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CHEM151_Lab_05
Arizona, CHEM 151
Excerpt: ... GenChem Week 5 Today's Agenda: Review understanding of light. Develop the day's problem. Perform the first challenge: measure the light emitted by an incandescent light bulb. Analyze results: determine the amount of light generated at different wavelengths. Determine the amount of energy generated at different wavelengths. Perform the final challenge: measure the light emitted by other light sources. Analyze results: determine the amount of light and energy generated at different wavelengths. Secondary analysis: compare light generated to power required. Final analysis: draw conclusions. Making Light Efficiently GenChem The chemistry of green Why would someone say that the 21st century must be the "Green Century"? GenChem Global Warming Why the concern? GenChem Greenhouse Gases What are they? Where do they come from? What's the connection to global warming? Gases that absorb energy (trap heat). Burning of fossil fuels, among other things. Increased amounts of greenhouse gases in ...
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incandescent_light_bulbs
UVA, PHYS 605
Excerpt: ... Incandescent Light Bulbs 1 Incandescent Light Bulbs 2 Question: Incandescent Light Bulbs An incandescent light bulb contains some gas with the filament. How would removing the gas affect the bulbs energy efficiency? Make it more efficient Make it less efficient No change Incandescent Light Bulbs 3 Incandescent Light Bulbs 4 Thermal Radiation All materials contain electric charges Thermal energy makes charges accelerate Accelerating charges emit electromagnetic waves All materials emit electromagnetic waves (thermal radiation) Black Body Spectrum The spectrum and intensity of electromagnetic waves from a black body depend only on its temperature Incandescent Light Bulbs 5 Incandescent Light Bulbs 6 Incandescent Bulbs Features: Tungsten filament yields light Electric wires deliver power Glass bulb protects filament Inert gas fill prolongs life Operation Issues Part 1 Filament temperature Determines color temperature and efficiency ...
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JeniferLui-techpost2-historyoflightbulb
Sveriges lantbruksuniversitet, TECH 114
Excerpt: ... g back to 1800s, the industrial era, the light bulbs that we use today have gone through several technological advances to get to this point. The road to the invention of the incandescent light bulb started years before Thomas Edisons patent in 1880. Attempts and advances that aided Edisons patent can be traced back through several crucial people. In 1835, James Lindsay was the first to publically demonstrate a constant electric light ( Incandescent Light Bulb, 2009). Because he was unable to develop a device that capable of being replicated and put into commercial use, his effort came up short sided. In 1840, Warren De la Rue made the first known attempt to create the incandescent bulb by enclosing a platinum coil in a vacuum tube and passing an electric current through it (Warren De la Rue, 2008). This design was quite successful, but again, was not ideal for commercial use and not cost effective due to the cost of platinum. Through previous discoveries, following inventors know that a m ...
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Lab3
Colorado, PHYS 1020
Excerpt: ... each lab report by titling the lab, listing your lab partners who are present, and listing the jobs that each lab partner has assumed for the lab. Remember, your lab report should give an explanation of all of your observations and measurements. Also, you need to think of and try one additional experiment for either Part 1, 2, or 3 of this lab that will further test your explanation of the results that you found. Lab Description: In this lab, you will use a spectrometer to investigate the colors of light emitted from three different sources: a hydrogen discharge lamp, a mercury discharge lamp, and an incandescent light bulb. The spectrometer that you will use to study these light sources is a grating spectrometer. The grating spectrometer works by using a diffraction grating to separate out the colors of an incoming light source according to their wavelength. A diffraction grating is made of many very closely spaced grooves or slits. The interference between the light that scatters off the different grooves ...
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studentexamplesS04
Allegheny, FSBIO 201
Excerpt: ... ng earlier, whereas plants damaged by herbivores must repair themselves before flowering can begin (Agren and Sclemske 1993). 9. Original (Abs): It was found that the difference in light sources make no difference in growth, with the exception of surface area under fluorescent light, which increases more than surface area under incandescent light . Problems: 1) "It was found that" is wordy and passive voice. 2) "difference.make" does not have subject-verb agreement "difference" is singular but "make" is plural. 3) "make" and "increases" are present tense, but here the author is referring the paper's results and not to published knowledge. Solution: Rewrite, eliminating problem phrase and correcting the verbs. Corrected: The source of light caused no differences in plant growth, except that the leaf area increased more in plants grown under fluorescent light than those grown under incandescent light . ...
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Ass#8
Hudson VCC, MATH 018
Excerpt: ... _ 2. (2 Points) Find the median value for energy efficiency for all of the bulbs in my house. Round your answers to the nearest whole number. (You may want to write out all 37 values in the list.) Answer: _ 3. (2 Points) Find the mean value for energy efficiency for all of the compact florescent lights (CFL's) in my house. Round your answers to the nearest whole number. (You may want to write out all 19 values in the list.) Answer: _ 4. (2 Points) Find the median value for energy efficiency for all of the compact florescent lights (CFL's) in my house. Round your answers to the nearest whole number. (You may want to write out all 19 values in the list.) Answer: _ 5. (2 Points) Find the mean value for energy efficiency for all of the incandescent light bulbs in my house. Round your answers to the nearest whole number. (You may want to write out all 18 values in the list.) Answer: _ 6. (2 Points) Find the median value for energy efficiency for all of the inc ...
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Wireless_Power_Final_Presentation
Georgia Tech, ECE 4007
Excerpt: ... Wireless Power Transfer by Inductively Coupled Coils Georgia Institute of Technology Electrical & Computer Engineering Curtis Jordan, Daniel Deller, Ray Lecture, Deller, Malik Little, Justin Freeman, Skip Dew Whit Smith Wednesday, December 1, 2008 Project Overview Transmit power wirelessly by resonant inductive coupling Charge a battery wirelessly Provide freedom of movement in electronic devices Target Market General electronics consumers Industrial and commercial electronics suppliers Cost Price per unit will be $250 Industrial cost varies with size of application Design Objectives Replicate MIT's demonstration Transmit power over 2 meter distance Illuminate an incandescent light bulb to verify system operation Improve system efficiency Improve the design of coils to increase dipole strength Add a reflector plate behind transmitting coil Charge a AA battery Design high frequency rectifying circuit Eliminate harmonics to maintain resonant frequency Coil Evolution Power Amp Previous power ...
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ps_1
Stevens, PS 344
Excerpt: ... Problem Set 1 Due: Tuesday, 22 January, 2008 at the beginning of lecture * On the solution set you submit, please: 1. staple multiple pages together; and 2. legibly (e.g. print) write your name and 4-digit ID number. Papers without this information will be awarded zero credit. * 1. Core 2.02 number of atoms in an incandescent light bulb filment 2. Core 2.09 spdf and electronegativity for potasium and bromine 3. Core 2.18 electronic structure of an aluminum atom 4. Core 2.21 equilibrium separation between two copper atoms 5. Callister 2.7 E-344 Spring 2008 6. Callister 2.14 and use the constants for A and B from Callister 2.15 to determine ro in 2.14 part 2. 7. From Test 1, spring 2007: The interatomic potentials characteristic of two different hypothetical elements, a and b, are described by the figure below. a. Which element has the higher melting temperature? Briefly justify your answer. b. Which has the larger ...
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ps_1
Stevens, PS 344
Excerpt: ... Problem Set 1 Due: Tuesday, 22 January, 2008 at the beginning of lecture * On the solution set you submit, please: 1. staple multiple pages together; and 2. legibly (e.g. print) write your name and 4-digit ID number. Papers without this information will be awarded zero credit. * 1. Core 2.02 number of atoms in an incandescent light bulb filment 2. Core 2.09 spdf and electronegativity for potasium and bromine 3. Core 2.18 electronic structure of an aluminum atom 4. Core 2.21 equilibrium separation between two copper atoms 5. Callister 2.7 E-344 Spring 2008 6. Callister 2.14 and use the constants for A and B from Callister 2.15 to determine ro in 2.14 part 2. 7. From Test 1, spring 2007: The interatomic potentials characteristic of two different hypothetical elements, a and b, are described by the figure below. a. Which element has the higher melting temperature? Briefly justify your answer. b. Which has the larger ...
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2b
Stevens, E 344
Excerpt: ... The density of tungsten (W) wire is 19.3 g/cm3. Its atomic weight is 183.85 g/mole. Estimate how many W atoms are contained in a piece of tungsten wire which has a diameter of 1 mm and a length of 1 cm such as might be found in the filament of an incandescent light bulb. ...
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Problem core 2.02
Stevens, E 344
Excerpt: ... The density of tungsten (W) wire is 19.3 g/cm3. Its atomic weight is 183.85 g/mole. Estimate how many W atoms are contained in a piece of tungsten wire which has a diameter of 1 mm and a length of 1 cm such as might be found in the filament of an incandescent light bulb. ...
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2b
Stevens, E 344
Excerpt: ... The density of tungsten (W) wire is 19.3 g/cm3. Its atomic weight is 183.85 g/mole. Estimate how many W atoms are contained in a piece of tungsten wire which has a diameter of 1 mm and a length of 1 cm such as might be found in the filament of an incandescent light bulb. ...
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Problem Set 4 2008
Cornell, DEA 455
Excerpt: ... DEA 455 /656 Research Methods in Human-Environment Relations Problem Set #4 1. Create graphs for the following information. Label axes. Nancy Wells a) Male patients recover faster in rooms that have incandescent light ing than in those with fluorescent lighting. Female patients recover faster in rooms with fluorescent lighting. b) The lower the average price of beer during Homecoming weekend, the greater the incidence of public drunkenness. For questions 2-4 point out: 1. whether each IV is within-subjects or between-subjects (be sure to identify the i.v.s too). 2. main effects and interactions reported. 3. other effects that were not measured, but that could affect the results. 4. two threats to internal validity that exist in each study. Briefly explain each one. 2. Social science researchers wanted to examine the effect that housing height (high-rise v. low-rise) has on community attachment as measured by the mean number of weekly social interactions with neighbors. The researchers used subjects from a ...
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INSIDEGRUNDYCOUNTYOctober262007
Iowa State, NR 89280
Excerpt: ... INSIDE GRUNDY COUNTY By Bill Arndorfer Grundy County Extension Education Director October 26, 2007 Have you thought about how to save energy and utilize practices that are more environmentally friendly? If you answered yes then you will be interested in the following ideas. Recently I had the opportunity to participate in a round table discussion on this topic. Some of these practices you may already be using, while others may be new to you. Either way, you are invited to consider the possibility of making changes that can help save money while protecting the environment. When you are ready to replace your standard incandescent light bulbs, choose compact fluorescent light bulbs. They last longer and will lower your electric bill. They come in a multitude of sizes and shapes. There may be rebates available with their purchase. When leaving a room be sure to turn off unneeded lights. Another energy saving practice is to buy energy-efficient appliances. Study the Energy Guide label on appliances before purchasi ...
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es101u5web
Idaho, ENVS 101
Excerpt: ... rmal and biomass energy. 5. Rank renewable energy sources from greatest to least potential looking 50 years into the future. Justify your ranking. Reading Assignment: Brennan and Withgott: Chapter 20; pages 588601. Chapter 21; pages 602628. 2 UNIT 5: ENERGY 5. RENEWABLE ENERGY RESOURCES MODULE 5.1 Improving Energy Efficiency A. IMPROVING ENERGY EFFICIENCY 1. Doing More with Less 84% of all commercial energy used in the USA is wasted Energyefficiency ENERGY EFFICIENCY - the percentage of total energy input that does useful work Increasingenergyefficiency-cars cars - 1975 - 1988 - 1992 - 1994 - 1997 - 2001 - MPG 1 mpg on US cars = 3 2. CASE STUDY 1 Compactfluorescents(CFLs)vsIncandescentLight Bulbs Efficiency: incandescent light ing fluorescentlighting CFL Sales: 1988 1992 1996 2000(est) CFLs last 10X as long as incandescents In 1999 incandescents out sold CFLs by 25:1 CFLtechnologycontinuestoimprove 4 3. CASE STUDY 2 THE CAR OPTIONS: InternalCombust ...
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Review Sheet for Final Exam E8 (2)
UC Irvine, ENVIRON E8
Excerpt: ... leading to environmental collapse: 1. Environmental Damage 2. Climate changes 3. Hostile neighbors 4. Friendly trade partners 5. Society's response to environmental problems Four explanations why societies make disastrous decisions: 1. Failure to anticipate problems 2. Failure to perceive problems when it arrives 3. Failure to try and solve the problems 4. Unsuccessful solutions *Twelve environmental problems AND how they are linked Two primary environmental problems: 1. Deforestation 2. Soil Problems *Two crucial behavioral choices Tragedy of the Commons: The depletion of a shared resource. The problem is that the people's actions will not make a difference in the gathering of resources which causes a extreme tragedy. Brown Restoring Earth chapters Ways to restore earth Ways to offset increase in energy use (using incandescent light bulbs, hybrid vehicles) Examples of renewable energy (wind, geothermal, hydro, solar, wave) Questions to think about: Identify the environmental problem you feel is the most i ...
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Spec_Lab_reva
Arizona, AS 102
Excerpt: ... d on the back of the spectroscope. Along with the spectrum is a wavelength scale. If your eyes don't focus well on close up objects, you may have to hold the spectroscope out a little distance to see it clearly. Taking Spectra with your Spectroscope NOTE: Any portion of the activity may be done in any order. That is, you may start with any of the 4 sections: either the "Fluorescent Light Bulb", or the "Discharge Tubes", or the " Incandescent Light Bulb". All of the sketches of spectra should be recorded on the template page at the end of the handout using colored pencils if possible (available at the lab but please bring your own if you have some). If you don't have colored pencils, be careful to label the ends of the drawing "red" and "blue" to match the colors you see. 1. Incandescent Light Bulb a. Looking through your spectroscope, examine the spectrum of an incandescent light bulb. You should see a continuous spectrum. On the left and right sides of the spectrum, the colors appear to fade to black. An inc ...
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Quiz1_Individual
Minnesota, TC 0002
Excerpt: ... EPsy 3264 Basic and Applied Statistics Quiz 1 Individual 9 pts. Name_ QUIZ 1 INDIVIDUAL A botanist was interested in determining the effects of scheduled watering (three days a week or daily) and the use of fertilizer (no fertilizer, traditional, and organic) in hopes of increasing the heat rating of jalapeo peppers. Several heat ratings were obtained for each pepper, and the average final heat rating for each pepper was recorded at the end of the growing season. 1. This study examines the effects associated with two factors. What are the two factors? (1pt.) 2. What is the response variable? Please be specific. (1pt.) 3. To study the effects of fluorescent versus incandescent light ing on productivity in a small factory, a researcher compares weekly productivity measures for those employees working under fluorescent lighting with similar measures for those working under incandescent light ing. Employees were not randomly assigned to a condition. Is this an observational s ...
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Experiment5 copy
Cornell, CHEM 2070
Excerpt: ... Experiment #5: Optical Spectrometry Purpose: The purpose of this experiment was to observe the emission spectra of various compounds by methods of spectrometry including the use of a spectrometer and a computer, to conceive and perform a procedure to identify the composition of a solution containing multiple ionic salts, and to construct an energy-level diagram for hydrogen. Results and Discussion: First, the spectra of a fluorescent light, an incandescent light , and helium were observed through a spectrometer. The wavelength, resulting color, and intensity were recorded for each emission and line of the spectra. Color, above each spectrum, wavelength, marked on each spectrum, and intensity, indicated below each spectrum, are all shown in the attached appendix, Experiment 5: Optical Spectrometry. See this appendix for results tabulated. Intensity was estimated on a scale of 0-10 for readings recorded through the spectrometer, and recorded out of a scale of 4000 for the readings measured by the computer. W ...
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