A 400-W computer (including its monitor) is turned on for 8.0 hours per day. If electric energy costs 10¢ per kWh, how much does it cost to run the computer annually for a 365-day year?
A) $120
B) $1200
C) $15
D) $150
A
You might also like to view...
The daily spin of Earth on its axis is called ________.
A. constellation B. rotation C. revolution D. precession E. annualization
What evidence supports the galactic fountain model?
A) We see a jet of ionized gas shooting out of the bulge of our galaxy. B) We have mapped several spiral arms of the Milky Way Galaxy. C) We see hot gas above the disk of the galaxy and cool gas that appears to be raining down from the halo. D) We have observed a lot of water molecules in the interstellar medium. E) We have no evidence yet for the galactic fountain model.
The greatest astronomer of antiquity [that is, of the time before the Middle Ages] was
A) Ptolemy. B) Copernicus. C) Brahe. D) Aristotle. E) Plato.
Which of the following is not a unit of energy?
A) Calorie B) joule C) calorie D) kilowatt E) British thermal unit