Understanding Integration Limits for Spherical and Cartesian Coordinates

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The discussion focuses on understanding integration limits for spherical and Cartesian coordinates in a homework problem involving a sphere displaced along the y-axis. The user expresses confusion about translating the origin to the center of the shape and seeks clarification on their integration limits. They mention that the volume is one quarter of a sphere and ask for help regarding the factor of 2 in their calculations. The conversation highlights the need for a better grasp of coordinate transformations and integration techniques in this context. Overall, the thread emphasizes the complexities of setting up integration limits for different coordinate systems.
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Homework Statement


Shown in the photo attached.
Screen Shot 2017-02-12 at 11.05.57.png


2. Homework Equations

V r2Sinθdθdφdr in spherical coordinates
V dxdydz in cartesian coordinates
equation of a sphere x2+y2+z2=r2

The Attempt at a Solution


In this case y=(y-2): sphere displaced on the y-axis. and since it is bound by all planes its going to be one quarter of a sphere. I don't get the part where the question says translate the origin to the shape centre, how can I do this? and also I need someone to check my limits of integration. I attached my answer.
IMG_7777.JPG
 
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Hi,

Can't say I understand your integration limits for the second part. Care to explain ? And where does the factor 2 come from ?
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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