Question

Will a homemade telephone made of two cans and a string work better with a tightly-woven string or a loosely-woven string?
Responses
A a tightly woven string because it will not come apart as easilya tightly woven string because it will not come apart as easily
B a loosely woven string because the sound waves have more room to movea loosely woven string because the sound waves have more room to move
C a tightly woven string because sound waves travel best through dense materialsa tightly woven string because sound waves travel best through dense materials
D a loosely woven string because sound waves travel best through less dense materialsa loosely woven string because sound waves travel best through less dense materials

Answer 1

C

A tightly woven (and kept taut) string transmits the vibrations from the can better. A tight, dense/firm string has better coupling and less internal damping than a loose, floppy string, so more of the sound energy reaches the other can.