End sections of steel rod oscillates according to the

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End sections of steel rod oscillates according to the law: x = 0,6sin10pt (microns). The rod extends longitudinal elastic wave. ECTA = 2 x 10 4 kgf / mm ^ 2, the density of steel of 8 g / cm ^ 3. Write the equation of oscillations of a point located at a distance of 2 meters from the source. Determine the source of power, if the cross-section of the rod 8 cm ^ 2.

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Task 40860. Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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