Which of the following is a key characteristic of orthogonal frequency-division multiplexing?
A. Amplitude modulation
B. Noise performance
C. Digital modulation
D. Spectral efficiency
D
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What progress occurred in early civilizations when the people began to grow their own food?
What will be an ideal response?
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A refrigerated fixture that operates with an evaporator temperature of 35°F is classified as a _____
a. moderate cooling application b. low-temperature application c. medium-temperature application d. high-temperature application
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In a series RLC circuit just above the resonant frequency, the impedance is:
A) at maximum. B) at minimum. C) more inductive. D) more capacitive.
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