DHS 13.3 - Option 21. Decisions Ryabushko AP

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• Calculate the mass of the D heterogeneous plate, given the limited lines, if the areal density at each point μ = μ (x, y)

1.21. D: y = x2, y = 2, μ = 2 - y

• Calculate the static moment of a homogeneous plate the D, limited data lines, with respect to said axis, using polar coordinates.

2.21. D: x2 + y2 + 2ay = 0, x + y ≤ 0, x ≥ 0, Ox

• Calculate the coordinates of the center of mass of a homogeneous body, occupying the area of the V, bounded by said surfaces.

3.21. V: y = x2 + z2, x2 + z2 = 10, y = 0

• Calculate the moment of inertia with respect to said homogeneous body axes, occupying the area of the V, the limited data surfaces. body density δ taken equal to 1.

4.21. V: z = 2 (x2 + y2), z = 2, Oz

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