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physics questions

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ahmed said
 
Reply Mon 6 Apr, 2015 12:26 pm
Expain why sound travels faster in solids but not in gas?
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Type: Question • Score: 1 • Views: 606 • Replies: 1
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contrex
 
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Reply Mon 6 Apr, 2015 12:27 pm
Because solids are stiffer (less compressible) than gases.

In general, the speed of sound c is given by the Newton-Laplace equation:

http://upload.wikimedia.org/math/a/1/d/a1d71272f86f0bc4fd28378131205381.png

K is a coefficient of stiffness, the bulk modulus (or the modulus of bulk elasticity for gases);
ρ is the density.

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