10. What is the speed of sound in air at -20°C?
A. 20 m/s
B. 319.5m/s
C.391.5 m/s
D. 591 m/s
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10. What is the speed of sound in air at -20°C?
A. 20 m/s
B. 319.5m/s
C.391.5 m/s
D. 591 m/s
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Answer:
B is the answer
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