The principle of superposition tells us that, if two waves cross paths,
A. the speed is the speed of the faster wave.
B. the wavelength is the sum of the individual wavelengths.
C. the frequency is the sum of the individual frequencies.
D. the amplitude is the sum of the individual amplitudes.
Answer: D
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Indicate whether the statement is true or false
__________ in an x-ray spectrum of an atom occurs because of rapid deceleration of the bombarding electrons
Fill in the blank(s) with correct word
A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges 0.70 kJ of heat to a cold temperature reservoir. What is the efficiency of this engine?
A) 54% B) 86% C) 46% D) 13% E) 27%
Carbon dating requires that the object being tested contain
A) organic material. B) inorganic material. C) charcoal. D) none of the above