Describe the benefits of compact fluorescents (CFLs).
What will be an ideal response?
CFLs provide the same light output as an incandescent lamp, but typically use only a quarter of the energy that an incandescent would. CFLs also put out only a fraction of the heat that incandescent lamps put out. This saves even more on electric bills in homes with air-conditioning and makes homes without air-conditioning more comfortable in the summer. Besides saving so much energy, a CFL lasts about five to fifteen times longer than a standard incandescent bulb. Therefore, by using CFLs, a home owner can save money in heating and cooling costs and on the amount spent on purchasing light bulbs.
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The goal of this problem is to determine the equilbrium number of carbon atoms in a cubic meter of a dilute iron?cementite alloy at 600 K, using eq. 9.14. The atomic volume of iron is 7.1??? per gram?atom.
What will be an ideal response?
Which of the following is not a step in the design process?
A. identify a problem or a need B. develop ideas to solve the problem C. obtain examples of several different kinds of previously created technical drawings D. select a proposed solution
In order to prevent a duct-mounted electric heater from being energized when the fan is not on, a(n) ____________________ should be used.
Fill in the blank(s) with the appropriate word(s).
In BCD, the decimal number 93 converts to ________ digits
Fill in the blank(s) with correct word