Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 4, Problem 17CQ
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The criteria to evaluate the right passive solar home design based on the local climate.
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The U.S. Department of Energy estimates that up to 10 percent of the energy use of a house can be saved by caulking and weatherstripping doors and windows to reduce air leaks at a cost of about $90 for materials for an average home with 12 windows and 2 doors. Caulking and weatherstripping every gas-heated home properly would save enough energy to heat about 4 million homes. The savings can be increased by installing storm windows. Determine how long it will take for the caulking and weatherstripping to pay for itself from the energy they save for a house whose annual energy use is $1500.
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Integrated Science
Ch. 4.1 - Prob. 1SCCh. 4.2 - Using the absolute temperature scale, the freezing...Ch. 4.3 - Prob. 3SCCh. 4.3 - Prob. 4SCCh. 4.3 - Prob. 5SCCh. 4.3 - Prob. 6SCCh. 4.3 - Prob. 7SCCh. 4.3 - Prob. 8SCCh. 4.4 - Prob. 9SCCh. 4.4 - Prob. 10SC
Ch. 4.4 - Prob. 11SCCh. 4.4 - Compared to cooler air, warm air can hold a. more...Ch. 4 - What is temperature? What is heat?Ch. 4 - Prob. 2CQCh. 4 - Prob. 3CQCh. 4 - Prob. 4CQCh. 4 - Why is cooler air found in low valleys on calm...Ch. 4 - Prob. 6CQCh. 4 - Prob. 7CQCh. 4 - Prob. 8CQCh. 4 - Prob. 9CQCh. 4 - Prob. 10CQCh. 4 - Prob. 11CQCh. 4 - The relative humidity increases almost every...Ch. 4 - Prob. 13CQCh. 4 - Prob. 14CQCh. 4 - Prob. 15CQCh. 4 - Prob. 16CQCh. 4 - Prob. 17CQCh. 4 - Prob. 18CQCh. 4 - Prob. 19CQCh. 4 - Prob. 1PEACh. 4 - Prob. 2PEACh. 4 - Prob. 3PEACh. 4 - Prob. 4PEACh. 4 - Prob. 5PEACh. 4 - Prob. 6PEACh. 4 - Prob. 7PEACh. 4 - Prob. 8PEACh. 4 - Prob. 9PEACh. 4 - Prob. 10PEACh. 4 - Prob. 11PEACh. 4 - Prob. 12PEACh. 4 - Prob. 1PEBCh. 4 - Prob. 2PEBCh. 4 - Prob. 3PEBCh. 4 - Prob. 4PEBCh. 4 - A 60.0 kg person will need to climb a 10.0 m...Ch. 4 - Prob. 6PEBCh. 4 - Prob. 7PEBCh. 4 - Prob. 8PEBCh. 4 - Prob. 9PEBCh. 4 - Prob. 10PEBCh. 4 - Prob. 11PEBCh. 4 - Prob. 12PEB
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- At a certain location, the solar power per unit area reaching Earth’s surface is 200 W/m2, averaged over a 24-hour day. If the average power requirement in your home is 3 kW and you can convert solar power to electric power with 10% efficiency, how large a collector area will you need to meet all your household energy requirements from solar energy? (Will a collector fit in your yard or on your roof?)arrow_forwardIn Arizona, photovoltaic (PV) panels can generate an average annual power of 1 MW/acre. If there are 311 sunny days per year in Arizona, but only 160 sunny days per year in Pennsylvania, how much average power (in MW/acre) could the same PV panels generate in Pennsylvania? Please include two decimal places in your answer. Note: assume that a cloudy day delivers 0 watts/acre of solar power. This is not true, but it simplifies the problem for us.arrow_forward10. Five people, all about equal masses, are in a perfectly sealed room in which the air conditioner is operating. The air conditioner removes heat at the rate of 500 kcal/h, maintaining a constant temperature. a) What is the average heat output per hour of each person in the room? b) What is the power rating in watts for an electric light bulb that puts out energy at the same rate as one of the individuals?arrow_forward
- Wind energy is becoming more common form of energy that can be used to run household appliances. a. If a windmill is connected to a hot water tank and is used to heat 60 L ( 60 kg) of water from 15 degrees celsius to 70 degrees celsius. How much energy is required? b. If energy from the utility company costs 0.35 cents per kilojoule, how much per kilojoule, how much money is saved in a year. If the water in the tank is heated 400 times?arrow_forwardExample: A building has a south-facing thermal storage wall with night insulation of Rins equal to 1.52 m²-K/W, applied for 8 h. Estimate the monthly heat transfer through the wall into the indoor space with and without night insulation for the month of December. The following data are given: 1. U₂ 2. = 3.7 W/m²-K. W = 0.42 m. 3. k = 2.0 W/m-K. 4. h; 8.3 W/m²-K. = 5. H, = 9.8 MJ/m²-K. 6. (τα) = = 0.73. = = 20°C. 7. TR 8. T₁ = 1°C. 9. A = 21.3 m².arrow_forwardA geothermal heating system is installed outside a house by laying pipesunderground, as shown in the image.The heat is transferred from the ground to the pipes to keep the house warm. How does this system of heating the house reduce the impact on the natural environment?A by providing energy to the groundB by conserving underground energyC by using a sustainable source of energyD by transforming one form of energy to anotherarrow_forward
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- Solar PV systems have large potential to produce large amounts of electricity in desert regions such as in Oman. It is proposed to build a very large solar PV system in the Al Sharqiya Desert to supply all of Oman's electricity needs which is about 28 x 10° kW-hr per year. If the average annual solar insolation in the Al Sharqiya Desert is 2400 kW-hr/m² per year, and assuming a solar cell efficiency of 20% and a system efficiency of 65%, A. What total PV area is required? B. If AI Sharqiya Desert has an area of 1.25 x 1010 m², what percentage of the desert will have to be covered with solar PV?arrow_forwardA 65-kg indoor rock climber eats an energy bar that has 500 kilocalories to fuel an afternoon of climbing. If the climber has a typical 20% efficiency for energy used by the body, how many times can the climber scale an 11.8-m wall using the energy provided by the bar? (1.00J = 4.184 cal) A. two timesB. three timesC. twelve timesD. fifteen timesarrow_forwardA 32% efficient electric power plant produces 900 MJ of electric energy per second and discharges waste heat into 20°C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical American house requires an average 20 kW for heating. How many homes could be heated with the waste heat of this one power plant?arrow_forward
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