Prove that sound travels through water
Discussion
Borrow:
A piece of scaffolding pole
A hammer
A boat full of divers
Drive the boat out into the sea. Throw divers off boat, tell them to come back when they hear a clanging sound.
Wait, I'll say that again ...
Tell divers to come back to the boat when they hear a clanging sound, THEN throw divers off the boat.
Wait around for a bit, unspecified length of time. Don't leave it too long, as the divers tend to come back when they run out of air without being asked to.
Put one end of the scaffolding pole in the water.
Bang the other end of the pole with the hammer.
Wait for divers to return.
QED.
A piece of scaffolding pole
A hammer
A boat full of divers
Drive the boat out into the sea. Throw divers off boat, tell them to come back when they hear a clanging sound.
Wait, I'll say that again ...
Tell divers to come back to the boat when they hear a clanging sound, THEN throw divers off the boat.
Wait around for a bit, unspecified length of time. Don't leave it too long, as the divers tend to come back when they run out of air without being asked to.
Put one end of the scaffolding pole in the water.
Bang the other end of the pole with the hammer.
Wait for divers to return.
QED.
stifler said:
Go to your local swimming pool. Go under water. Clap your hands or hit your fist into your other hand. It comes out surprisingly loud. This is because water is denser and therefore more efficient at transmitting waves than air.
Pedantically, get someone else to clap their hands, and don't stand on the bottom. As there is no other route or medium for the sound to reach your ears (such as through your own arms or the floor), sound must be transmitted through the water. Or not. If you don't hear anything.prand said:
We used to do this at school. One guy would go up to the end of the 50m pool and go under water and set his watch alarm off. Under water at the opposite end you could hear it as clear liek it was next to you.
Shaw Tarse said:
Swimming pool.
Watreproof watch with an alarm.
Mate the other end of the pool.
It's what we did when I was young.
I think it's quite touching you've found each other after all these years. Do you still have the watch?Watreproof watch with an alarm.
Mate the other end of the pool.
It's what we did when I was young.
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