Answer:
1 yes, you can hear a soumd through a door using this phone
2. The super-tight string combination produces the best sound
3.yes, If someone grabs the string, or it gets stuck on something, the sound waves dissipate, and the phone doesnt work
Explanation:
When the cans string is stretched tightly, it gives the sound wave vibrations a straight path to travel down, so the sound is carried stronger through the string and directly into the other persons ear. If someone grabs the string, or it gets stuck on something, the sound waves dissipate, and the phone doesnt work.
Pa brainly if your satisfied with my answer 🙂