In its monthly bill, the electric company charges you primarily for
A) the useful energy output that all your electric devices produce during the month.
B) the number of cabbages you consume during the month.
C) the electric power you consume during the month.
D) the electric energy you consume during the month.
E) the electric force you consume during the month.
D
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Suppose you live on the Moon. How long is a day (i.e. from sunrise to sunrise)?
24 hours a lunar month 23 hours 56 minutes a year
Precipitation in the form of rain or snow can result
from a)the curving of wind direction by the Coriolis Effect. b)descending air due to vertical thermal circulations. c)air that is heated by solar insolation above its dew point. d)warm air flowing up and over cooler air where two air masses meet.
The potential energy of a spring is 0.3 J when it is compressed 0.04 m to the left of its equilibrium position. This is its leftmost position. What is its kinetic energy at this point?
A. 375 N/m B. -0.3 J C. zero D. 0.3 J
Even though modern astronomers know that stars are scattered through space at different distances, they still use what scientific model to describe celestial locations in the sky?
a. apparent visual magnitude b. Copernican revolution c. celestial sphere d. scientific orb e. planetarium dome