An electric device delivers a current of 5.0 A for 10 seconds. How many electrons flow through this device?
A) 0.20
B) 20
C) 2.0
D) 3.1 × 1020
E) 31 × 1020
D
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For which of the following reasons is production of ethanol unwise?
a. Pollutants aren't significantly reduced. b. It takes twice as much fossil-fuel energy to produce ethanol than the ethanol that is produced supplies. c. It can drive costs of corn higher. d. All of the above.
At sunset, the ____ Moon phase will be highest above the southern horizon for an observer in the Northern Hemisphere
a. new b. waxing crescent c. first quarter d. full e. third quarter
The uncompressed density of a planet in our solar system
a. is greatest for the Jovian planets. b. is greatest for the planets closest to the Sun. c. is greatest for the planets furthest from the Sun. d. is greatest for the planets with the largest mass. e. is greatest of the planet with the largest radius.
Write the node equations for describing heat transfer through the buried waste shown in Figure 2-67.
