Infiltration can be reduced primarily by ________
a. insulation
b. double pane windows
c. weatherstripping
d. lowering the thermostat
e. furnace maintenance
c
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When a battery does 24 J of work on 10 C of charge, the voltage it supplies is
A) 2.4 V. B) 4.2 V. C) 24 V. D) 240 V. E) none of the above
A toaster is rated at 800 W when operating at 120 V dc. What is the resistance of its heating element?
A) 16 ? B) 18 ? C) 6.7 ? D) 0.15 ?
The extent of the continental shelf, an underwater extension of continental crust from shoreline to basin, varies due to fluctuations in sea level. When sea level is lower, the continental shelf is
A) is narrow because less of the continental shelf is exposed. B) is narrow because less of the continental shelf is submerged. C) wider because some of the continental land would be submerged.
If you saw the label "phenylephrine HCl" on a decongestant, would you worry that consuming it would expose you to the strong acid hydrochloric acid, HCl?
A) No, because it is balanced by the phenylephrine. B) No, because the drug is in the solid phase. C) No, because this is a salt made using hydrogen chloride, but it is in no way hydrogen chloride. D) Yes, because of the hydrochloric acid it contains.