Engineering, 07.08.2019 18:30 19deleonl
What is the speed of sound? (a)-in air, at ground (20 c) (b)-in air, for airplane ( c) in water in steel
Answers: 2
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What is the speed of sound? (a)-in air, at ground (20 c) (b)-in air, for airplane ( c) in water in...
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