Question

reduces.
(3)
Take two paper cup and join them by 10-15 meter lang thread and talk to cach other according
to given image How do you hear? Write your experience​

Answer 1

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$\bold\purple{Introduction}$

Have you ever tried to have a conversation with someone so far away that you couldn't really hear each other? Without yelling, it's hard to have a conversation over long distances. So these days it's nice to be able to use telephones to talk with someone whether he or she is 100 yards or 100 miles away.

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Back before there were cell phones or even cordless phones, all telephones were hooked up to wires that helped to carry the sound of a person's voice (via an electric signal). And you can use the same concept to build your own telephone using just cups and some string. What message are you going to share over the string?

$\bold\purple{Background}$

When we talk, our vocal cords make molecules in the air vibrate. (You can feel the vibrations by holding your hand against your throat while you talk.) Those vibrating air molecules make other air molecules around them vibrate, and so on, which is how sound travels through the air. (Different pitches of sound move in waves that have different spacing between them-or "frequency.") Other sources of sound, such as guitar, violin or piano strings are good examples of how vibrations can generate sound.