A 400-W computer (computer plus monitor) is turned on 8.0 hours per day. If electricity costs 10 cents per kWh, how much does it cost to run the computer annually?
A) $116.80
B) $1168.00
C) $14.60
D) $16.80
E) $146.00
A
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The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because
a. the solar nebula from which the planets formed had a disk-like structure. b. the bipolar flow from the young sun cleared all material out of the nebula except that in the disk. c. Jupiter's gravity was great enough to pull all of the other planets to the plane of its orbit. d. the Milky Way Galaxy from which the planets condensed has a disk like structure
There are 3,600 arc seconds in a degree
Indicate whether the statement is true or false
Compared to the distance between Earth and Mars, the distance between Jupiter and Saturn is
A) about the same. B) much larger. C) much smaller. D) just slightly less.
You look inside your piano and find that there are two types of strings: bare steel wire and steel wire wrapped with a copper coil. If you have one of each type of string with the same length and under the same tension, which will produce a lower frequency sound wave?
A. The bare wire will have a lower frequency. B. The wrapped wire will have a lower frequency. C. They will have the same frequency.