Question

What is the speed of sound in vaccum?

Answer 1

Sound cannot exist in a vaccum since sound requires a medium to reciprocate and there is nothing in a vaccum.

Answer 2

${\sf{ \blue{\underline{\pink{ \underline{{ \red{There \: is \: no \: medium \: in \: vaccum \: so \: sound }}}}}}}} \\ {\sf{ \blue{\underline{\pink{ \underline{{ \red{cant \: travel \: in \: vaccum.}}}}}}}} \\ {\sf{ \blue{\underline{\pink{ \underline{{ \red{but \: the \: speed \: of \: sound \: is \: \blue{343 \: \frac{m}{s} } \: in \: air.}}}}}}}}$