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 Sep 18, 2022
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Speed of sound in vacuum is :
Difficulty: Easy
A: 
$\rm{340\,ms^{-1}}$
B: 
$\rm{3 \times 10^{8}\,ms^{-1}}$
C: 
$\rm{4000\,ms^{-1}}$
D: 
None of these
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NETNUST Entry TestPhysicsWaves