What are the Spherical Coordinates for a Quarter Ball Volume?

Click For Summary
SUMMARY

The discussion focuses on calculating the volume of a quarter ball using spherical coordinates. The integral to evaluate is ∫∫∫ 1 / √(x²+y²+z²) over the specified limits: -4≤x≤4, 0≤y≤√(16-x²), and 0≤z≤√(16-x²-y²). The correct limits for spherical coordinates are established as 0<ρ<4, 0<θ<π, and 0<φ<π/2, indicating a quarter ball in the first octant.

PREREQUISITES
  • Understanding of spherical coordinates and their conversion from Cartesian coordinates
  • Familiarity with triple integrals in multivariable calculus
  • Knowledge of the geometric interpretation of volume in three-dimensional space
  • Experience with integral limits in multiple dimensions
NEXT STEPS
  • Study the conversion formulas for spherical coordinates: ρ, θ, and φ
  • Learn how to set up and evaluate triple integrals in spherical coordinates
  • Explore examples of calculating volumes of different geometric shapes using spherical coordinates
  • Investigate the relationship between Cartesian and spherical coordinates through practical problems
USEFUL FOR

Students in calculus courses, particularly those studying multivariable calculus, as well as educators and tutors looking to clarify concepts related to spherical coordinates and volume calculations.

mrkb80
Messages
40
Reaction score
0

Homework Statement



I am having so much trouble with this one problem ( and spherical coordinates in general ).

Any help would be amazing:
∫∫∫ 1 / √(x2+y2+z2)

Over -4≤x≤4, 0≤y≤√(16-x2), 0≤z≤√(16-x2-y2)


Homework Equations





The Attempt at a Solution


I know that rho2 will replace √(x2+y2+z2) in my integral, but I am having a really hard time understanding what my limits of integration should be for rho,phi, and theta. I think it is some sort of a snow cone, where theta is from 0 to pi/2 but I'm really not sure.
 
Physics news on Phys.org
Your volume is a quarter of a ball. A ball cut in 4 pieces by two ortogonal planes.
This is 0<rho<4, 0<theta<pi, 0<phi<pi/2
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
2K
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
10K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
9K