The numerical statistical theory of the Cairo techniques predicts a relationship between thermal diffusivity α and the speed of light C in a natural cooling curve.

For example, for a metallic cube whose side l is [1, 2, 3],

the strings of the B matrix provide the first unique and rigorous proof of Sabine's experimental reverberation formula in a century:

U(t) = U(0). Exp -t [Constant. Area / C. Volume]. . . . . . (1)

C is the entanglement velocity. The reverberation velocity of sound is obviously the speed of sound in air at NPT = 330 ms^-1.

The same thing happens in the free cooling curve of metal cubes and leads to the following formula,

C = T½ * log 2 * L²/ (thermal diffusivity α) . . . . (2)

T1/2 is the half-life of the cooling curve of a metal cube of C.

T1/2 should be measured experimentally.

T1/2 of a free cooling curve T1/2 for a 10 cm aluminum cube at 45 seconds

and that of a similar iron cube at 100 seconds

The thermal diffusivity α is determined from thermal tables:

α (Al) = 1.18 E-5 MKS units

α (Iron) = 2.5 E-5 MKS units

If we substitute the above numerical values of α, L and T1/2 ​​into equation 2, we obtain C, the speed of light, equal to 2.95 m s^-1 for both cases.

But the question arises: what is going on here and why is the thermal diffusivity α related to the speed of light C?

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