A machine puts out 100 W of power for every 1000 W put into it. The efficiency of the machine is
A) 10 percent.
B) 50 percent.
C) 90 percent.
D) 110 percent.
E) none of the above
A
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Earthquake P-waves are most like
A) water waves because they have crests and troughs. B) vibrations in a string because they vibrate perpendicularly to the direction of travel. C) light waves because they are transverse. D) sound waves because they are longitudinal.
Rocks that are now tilted were deposited ____________________. Fill in the blank(s) with the appropriate word(s)
What two European groups, beside the Spanish, sent explorer to California coast?
A) The French and the Portuguese B) The Germans and the Prussians C) The British and the Russians D) The Dutch and the Swedish
The region called ____ has a semi-arid climate and typically has short bunch grass, scattered low bushes, sparse trees, or sagebrush
a. ?steppe b. ?savannah c. ?chaparral d. ?tundra e. ?taiga