Why do sound waves need a medium through which to travel?

1 answer:

3 0

Sound waves need a medium to travel in because sounds are vibrations in mediums. That's the reason why the phrase "Nobody can hear you scream in space" came from. Space has no medium for sound to reverberate through.<span />

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The surface Area of piston A is 2 square inches, while the surface are of piston B is 4 square inches. If piston A is pushed dow

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Distance piston B = 3 [in]

Explanation:

This problem can be solved using the pascal principle, which is applied for both pressures and volumes. In this case we use the definition of volumes, which says that the volume displaced fluid on one side of the Pistons should be equal to the volume displaced on the other side of the piston.

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$V_{A}=V_{B}\\A_{A}*d_{A}=A_{B}*d_{B}\\2*6=4*d_{B}\\d_{B}=12/4\\d_{B}=3[in]$