Spherical shape surface area calculation

  • Thread starter gaber2611
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Homework Statement


upload_2014-10-12_13-3-58.png


Homework Equations


[/B]
Surface area of sphere = 4*Pi*r^2, where r: is the radius of the sphere circle


The Attempt at a Solution


Solution:[/B]

1. In terms of “r” and “R”, and the radius of sphere “S”, and “d”:

Given that:

· Surface area of both shaded area are equal: That means,

The area bounded by P, A (outside Q) = the area bounded by N&M, A (N&M), while,

The area bounded by P = the area outside Q, A (outside Q), then

A (outside Q) = A (N&M)

And for the surface area bounded by N&P “A (N&P) “

A (N&P) = the whole area of the sphere S “A (S) “–[A (outside Q) + A (inside Q) + A (N&M)],

And for, A (N&M) = A (outside Q), then,

A (N&P) = A (S) – [2*A (outside Q) + A (inside Q)]

Knowing that the surface area formula of sphere “A sphere” = 4*Pi*r^2

Where Pi = 3.143, and r: the radius of the sphere circle

· given that the radius of the sphere is “S”, then,

ØA (S) = 4*Pi*S^2

· given that the radius of the sphere Q is “r”, then

ØA (inside Q) = 4*Pi*r^2.

A (outside Q) =

Dear Sirs here,

As you see its a problem of getting the surface area of irregular shape which you had seen in the previous image,

Expecting that you took a look at my attempt solving the problem, and understood how i prepared the equation to get the bounded surface area between curves N&M, having those small red curves with the available given data,

what i need the help for, is that the area outside the sphere Q which is limited by the curve P, " i used symbol for it of A (outside Q)" and those red small curves, is how i get the equation which calculates that area win terms of "r", "S", "d" and "R"?, or any of these parameters, and then later i optimize the equation to be in terms of those parameters

Looking forward to hear from you, and will appreciate your help, i have been using physics forums for many years ago, and putting a big hope in here to get the help

Thanks

 

Answers and Replies

  • #2
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Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

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