|44˚ | Calculations: • Calculate electrical energy E delivered to the incandescent light bulb. Express your result in Joules [J] • Convert your result into calories [cal] • Calculate the amount of heat absorbed by water and plastic jar. Express your result in calories [cal] • Calculate efficiency of the incandescent light bulb. Express your result in % Question: Comparison of Fluorescent and 75-W Incandescent Light Fixtures
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produced by a heat engine‚ which transforms thermal energy‚ often from combustion of a fuel‚ into rotational energy. Most thermal power plants produce steam‚ and these are sometimes called steam power plants. Not all thermal energy can be transformed to mechanical power‚ according to the second law of thermodynamics. Therefore‚ thermal power plants also produce low-temperature heat. If no use is found for the heat‚ it is lost to the environment. If reject heat is employed as useful heat‚ for industrial
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xam 2 [pic] Summer 2011 Chemistry 1411 EXAM # 2 Activity Series of Metals in Aqueous Solution [pic] CHEM 1411 Exam # 2A Name:________________________________ (Chapters 4‚5‚6‚ and 7) Score: [pic] Part I- ( 3 points each) - Please write your correct answer next to each question number‚ DO NOT CIRCLE. ____ 1. Compare the rates of effusion of CO2 & SO2‚ rCO2/rSO2 A. CO2 will effuse 1.45 times
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create a cold environment or drive any direct cooling processes. Is implemented by using Cool roofs‚ that are roofs that can deliver high solar reflectance (the ability to reflect the visible‚ infrared and ultraviolet wavelengths of the sun‚ reducing heat transfer to the building) and high thermal emittance (the ability to radiate absorbed‚ or non-reflected solar energy)‚ and green roofs or living roofs‚ which are roofs of buildings that are partially or completely covered with vegetation and a growing
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demonstrates calorimetry‚ or the technique of measuring heat effects in the surroundings. In order to make sure that there is no temperature change‚ or that it is an isothermal heat transfer‚ it is kept at a similar temperature in an ice bath. By knowing the change in volume‚ the density of ice‚ and the density of liquid water‚ it is presumed that then you could decipher the mass of the ice that melted. With this‚ it is possible to understand the transfer of heat from this chemical equation to its surroundings
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Effect of Temperature on Cricket Respiration Crickets are ectotherms that rely on their environment as a source of heat for their metabolism. Warmer temperatures allow crickets to respire at a greater rate. Respiration rate (ppm/sec/g) 1.2 1 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 40 45 Temperature (°C) Figure 1: Respiration rate (ppm/sec/g) of crickets at 6 different temperatures (°C). Values are means of 6 respiration rate measurements. Error bars represent
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Types of energy: kinetic e(in joules)= .5mv^2. Solar energy- 1gw per km^2 Solar energy can be turned into electricity through solar cells 15%=cheap‚ 40% efficiency=expensive. Caloric theory of heat=caloric fluid flows from hot object to cold. Heat engine= device to turn heat energy into useful work: heat comes from something hot but only some goes to useful work. Satellites=free fall. Ionizing radiation=energy in the form of waves or paricle Beta radiation-just an electron‚ wont go through skin
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Blake Battogtokh Period 6 Research Plan Research Questions: 1. What are the four types of heat transfer? 2. What are the functions of a refrigerator? 3. What are the definitions of each type of heat transfer? 4. Is ice-cold bath the best cooling device to cool a soda? The goal of the project is to determine which type of cooling device will be effective in cooling a soda. In other words‚ the effect of cooling devices on soda cans. There will be four types of cooling devices used
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Tesla White Academic Article #1 January 26‚ 2013 10:00 a.m. The concerns of this article revolve around human health and how it is affected by climate change. Climate change endangers human health affecting all sectors of society both domestically and globally. The atmosphere determines the dispersions‚ transport‚ and development of air pollutants and there is concern that change in climate could affect the human body associate with gases and particles. “As part of a congressionally mandated
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reaches the planet’s surface and is reflected upward again as a type of slow-moving energy called infrared radiation. Heat travels due to radiation and hetas up both the thermometers. But the one inside the testtube gets heated more consistently. This happens because there is air trapped inside the testtube which acts as a heat store. As the air molecules get heated‚ they absorb the heat and then slowly give it out in all directions as well. in the cas of the thermometer which is out in the
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