Math Problem Statement
Solution
The problem describes a solid between planes perpendicular to the -axis at and . The cross-sections of the solid are circular disks whose diameters run from the -axis to the curve given by the equation .
Steps to solve:
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Understanding the cross-sections: The cross-sections perpendicular to the -axis are circular disks. The diameter of each disk at a given value of runs from the -axis () to the curve . So, the diameter of the disk at any is: The radius of the disk is half the diameter, so the radius is:
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Area of a circular cross-section: The area of a circular cross-section at a given is given by the formula for the area of a circle . Substituting the radius:
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Volume of the solid: The volume of the solid can be found by integrating the area of the cross-sections along the -axis from to : Simplifying the integral: Now, compute the integral of : Evaluating this from to :
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Final volume: Substituting this back into the expression for the volume:
Thus, the volume of the solid is cubic units.
Would you like further details or explanations on any part of the solution?
Here are 5 related questions for practice:
- How would the volume change if the parabola equation was ?
- What if the cross-sections were squares instead of circular disks?
- How can you use cylindrical coordinates to solve a problem with circular cross-sections?
- What is the physical interpretation of cross-sectional volumes in real-world applications?
- How would the limits of integration change if the region extended to ?
Tip: Always check the units of the result, especially in physical applications where the dimensions of objects must match!
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Math Problem Analysis
Mathematical Concepts
Solid Geometry
Cross-sectional Area
Integration
Formulas
Area of a circle: A = πr^2
Volume by integration: V = ∫ A(y) dy
Equation of parabola: x = sqrt(17)y^2
Theorems
Method of Disk Integration
Suitable Grade Level
Grade 12 / College Level Calculus
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