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

1.30. D: x = 0, y = 0, x + y = 2, μ = x2 + y2

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

2.30. D: x2 + y2 + 2ay = 0, y - x ≤ 0, x + y ≤ 0, Ox

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

3.30. V: z = x2 + y2, x2 + y2 = 4, z = 0

4. 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.

4.30. V: z = 3 - x2 - y2, z = 0, Oz

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