回复: 20 Centigrade?

[lianqii]

Hi Barrie,

Copper can propagates both longitudinal waves and transverse waves.
   In a solid,longitudinal waves travel at a speed represented by the
formula
                   v=(Y/p)^(1/2)
where p is the density of the solid and Y is called the elastic modulus
   The density of the copper is about 8.9 gramms per mm^3 ,the elastic
modulus of copper ranges from 75 to 130 Gpa (many kinds of copper,brass,or
others).so the corespondance longitudinal speed ranges from 2900 m/s to 3800
m/s.
   As for the transverse waves,the speed is dependent on the shape.
   Temperature is a fator to influnce the speed,higer the temperature,faster
the speed.
   Hope it helps.

    Baoli Liu
Shenyang Conservatory of Music
China

-----Original Message-----
发件人: Barrie Heaton <Piano@forte.airtime.co.uk>
收件人: pianotech@ptg.org <pianotech@ptg.org>
日期: 1998年11月28日 4:11
主题: 20 Centigrade?


>Can you help this man
>
>Barrie,
>
>Hi there, could you tell me or find out for me what the velocity of
>sound is in copper at 20 Centigrade? Thanx
>Nicholas
>
>
>
>
>
>--
>
>Barrie Heaton                                  |  Be Environmentally
Friendly
>URL: http://www.uk-piano.org/                  |  To Your Neighbour
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>