Q.No.153: - Why two tin cans with a string
stretched between them could be better way to communicate than merely shouting
through the air?
Ans: - When two tin cans are attached with a stretched string then
the string becomes a medium that transmit sound wave from one can to the other.
String is a solid and it makes a batter medium of transmitting sound wave
rather than air. When we shout in air then air carries sound with low speed
than a stretched string.
2 comments:
Why sound speed fast in solid
Because the atoms in a solid are closely packed together and thus their contact make the sound waves easier to travel through them. The speed of sound in solid is 5000m/s . The atoms of a liquid are not as closely packed as in a solid so the speed of sound in water is 1500m/s. The atoms of air are further apart thus the speed of sound in air is 340m/s at 0°C
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