Can someone explain to me these equations of sound waves?

[core1985]

A bomb explodes on Mars how long will sound waves to travel from Mars to earth??
Ans= 0sec?? or any other answer needs only little hint

 

[DrDu]

 

[core1985]

means vacuum then sound waves cannot travel??

 

[DrDu]

Yes, exactly.

 

[core1985]

so the answer should be cannot travel

 

[core1985]

thanks

 

[DrDu]

Although Mars itself has a dilute atmosphere, so that you will hear an explosion when you are on mars, interplanetary space between Mars and Earth is an almost perfect vacuum, so sound cannot travel from Mars to earth.