Nine, old, 12 ft^2 windows with U= 1.2 Btu/ hr·ft^2·? were replaced with new windows having U = 0.3 Btu/ hr·ft^2·? . Calculate the energy savings on a day during a 5-hour period, when Tin = 68ºF, Toutside = 10ºF.
What will be an ideal response?
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____________________ gases prevent the atmosphere from contaminating the weld metal as it transfers across the arc gap.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about steel studs is not true?
a. Steel studs are stronger and lighter than wood studs. b. Steel studs will not warp, swell, split, or burn. c. Steel studs are harder to handle than wood studs. d. Steel studs are connected using self-tapping sheet-metal screws.
What are the three components of an Agriscience Fair project?
What will be an ideal response?
Why is the voltage of electricity increased for transmission over long distances?
A) It increases the resistance of the lines. B) It creates an alternating current. C) It reduces the amount of electricity loss. D) It speeds up transmission times.