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12 years ago
A Doppler weather radar operates at a frequency of 3.40 GHz. The wave from this radar system reflects from an approaching weather system moving with a speed of 39.0 m/s. What is the difference in frequency between the outgoing and returning waves?
A) 442 Hz
B) 351 Hz
C) 419 Hz
D) 322 Hz
E) 670 Hz
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