First of all, it needs a source. But mostly, it needs vibrations. Depending on how strong the vibrations are determine how long the sound wave will travel.
Sounds need a medium to travel, such as air, water, or solid materials. As sound waves pass through the medium, they cause particles to vibrate, transmitting the sound energy from one point to another. Without a medium, such as in a vacuum, sound waves cannot travel.
It does not need a medium.
It does not need a medium.
Sound can't be heard on the moon because sound need a medium to travel and particles to collide each other in order to travel. since in a vaccum (space) you do not have air, meaning no particles, sound can't be heard on the moon.
Yes, Ukrainians need a visa in order to travel to Singapore.
Yes. Even infants need it in order to travel especially international travel.
Yes, the Amtrak ticket must be in the passenger's name in order to travel.
Animals need a lot of energy to move or travel to places.
Yes you can but you also need you passport in order to travel there and other documents depending on where you are from.
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Travel is opening up to Cuba. You will need to have a passport in order to travel.
No, louder sounds do not travel faster than quieter sounds. Sound travels at the same speed regardless of its volume.