Problem 50011.

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Luminous flux 9W normally falls to the surface area of \u200b\u200b10 cm2, the reflection coefficient is equal to 0.8. What pressure tests at the same this surface?

A detailed solution with a brief note of the condition, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
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15.02.2018 22:04:27

Автор помог

01.06.2014 15:36:06

Просто и понятно