Sound & Vibrations

You have heard music make you feel something. But can it make something move — without touching it?

You have three spoons — metal, wooden, plastic. They all do the same kitchen job. But do they all have the same voice?

Which glass will make the highest note?
Which one do you think will make:
The highest note?
The lowest note?

Can a coat hanger really sing? It has no vocal cords. Knock it against a desk and all you get is a dull, forgettable clunk.

Can you send a secret message using nothing but two cups and a piece of string?

Can you make a wave travel from your hands to your partner's without either of you moving toward each other? And once you've done it one way — is there a second, completely different way to make a wave travel along the same spring?