Sorry, I dunno anything about materials. I would like to know the
formula to figure out the longitudinal and shear velocity in Glass
PYREX.

HEre the details: Material PYREX

Coefficient of Expansion (20°C – 300°C) 3.3 x 10-6 K-1 Density 2.23 g/cm3 Refractive index (Sodium D line) 1.474 Dielectric Constant (1MHz,20°C) 4.6 Specific heat (20°C) 750J/kg°C Thermal conductivity (20°C) 1.14W/m°C

Poisson's Ratio (25°C – 400°C) 0.2 Young's Modulus (25°C) 6400 kg/mm2

Refractive index (Sodium D line) = 1.474 Visible light transmission, 2mm thick glass = 92% Visible light transmission, 5mm thick glass = 91%

I used this equation:

symb bulk = $young / ( 3.

but doesn t work substituting this pascal conversion for the poisson ration of 9.8*10e6 kg/mm2= 1pascal. The bulk velocity is 348410e7 m/s!!!!!

2) is there any way to find out the attenuation in pyrex with my data? Please help me! Thanks a lot manuela

HEre the details: Material PYREX

Coefficient of Expansion (20°C – 300°C) 3.3 x 10-6 K-1 Density 2.23 g/cm3 Refractive index (Sodium D line) 1.474 Dielectric Constant (1MHz,20°C) 4.6 Specific heat (20°C) 750J/kg°C Thermal conductivity (20°C) 1.14W/m°C

Poisson's Ratio (25°C – 400°C) 0.2 Young's Modulus (25°C) 6400 kg/mm2

Refractive index (Sodium D line) = 1.474 Visible light transmission, 2mm thick glass = 92% Visible light transmission, 5mm thick glass = 91%

I used this equation:

symb bulk = $young / ( 3.

*** ( 1. - 2. ***$poisson ) ) symb shear = $young / ( 2. * ( 1. + $poisson ) )but doesn t work substituting this pascal conversion for the poisson ration of 9.8*10e6 kg/mm2= 1pascal. The bulk velocity is 348410e7 m/s!!!!!

2) is there any way to find out the attenuation in pyrex with my data? Please help me! Thanks a lot manuela