Antinoise technology is based on
A. wave speeds in different media.
B. the Doppler effect.
C. interference.
D. none of the above
Answer: C
You might also like to view...
A catastrophic earthquake is one with a magnitude over 9.0. It has strong effects over areas thousands of miles in diameter. Catastrophic earthquakes are recorded about once every
A. 20 years. B. month. C. 500 years. D. 2 years.
A mineral is light colored, transparent, has a hardness of seven, and fractures rather than cleaves. What minerals is it?
A. biotite B. muscovite C. garnet D. quartz E. feldspar
Judge the following sentence according to the criteria given below. It is essential to know the rate of current sea-level rise because approximately 100 million people live around the world at locations less than 1 meter above sea level
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
Which island is strategically important to the U.S. due to its status as apower projection hub that can be used as a forward base that is five days' sailing time closer to Asia than Hawaii?
a. Guam b. Samoa c. Fiji d. Tuvalu e. Nauru