Finding the volume using cylindrical coordinates

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SUMMARY

The discussion focuses on calculating the volume and centroid of a solid bounded by the plane z=y and the paraboloid z=x²+y² using cylindrical coordinates. The volume is determined through the triple integral V= ∫∫∫dv, with the transformation to cylindrical coordinates defined by x= r cos θ, y= r sin θ, and z=z. The user seeks clarification on the limits of integration for the variable r in the context of the given solid.

PREREQUISITES
  • Cylindrical coordinates transformation
  • Triple integrals in multivariable calculus
  • Understanding of volume calculation in three-dimensional space
  • Knowledge of paraboloids and planes in Cartesian coordinates
NEXT STEPS
  • Study the derivation of limits of integration in cylindrical coordinates
  • Learn about the properties of paraboloids and their intersections with planes
  • Practice solving triple integrals using cylindrical coordinates
  • Explore centroid calculations for solids in three dimensions
USEFUL FOR

Students in calculus courses, educators teaching multivariable calculus, and anyone interested in solid geometry and integration techniques.

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Homework Statement


Use cylindrical coordinates to find (a) the volume and (b) the centroid of the solid S bounded above by the plane z=y and below by the paraboloid z=x2+y2.


Homework Equations


V= ∫∫∫dv
x= r cos θ, y=sin θ, z=z

The Attempt at a Solution


For the first integral I got that the limits are from r2 to r sin θ, then I integrated with respect to z, but after that I don't know where "r" begins and ends how do I find the interval?
 
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May I have some help on this?
 

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