Cross sectional area (NOT A QUESTION)

[moonman239]

Just for those who don't know a thing about cross sectional areas, I thought I'd explain.

A cross sectional area describes the area of a flat (2-dimensional) representation of a 3-dimensional object. So if I cut a cylinder, instead of seeing two circles, I see four circles (unless there are other circles in my environment). The cross-sectional area is the area of either of the two circles.

For a cylinder or right solid, the cross-sectional area is the area of the base.
For a sphere, the cross sectional area is the area of a circle with the same radius (pi*r²).
For an ellipsoid, the cross sectional area is the area of an ellipse with the same long (a) and short (b) axes (pi*ab).

 

[Landau]

I don't know what to say. Thanks for sharing?

 

[theoryiscool]

lol at landau's response

 

[moonman239]

Oh, for an oblate ellipsoid (such as Earth), where lines of latitude are circular, the area is simply pi*(r^2)

 

[blue_raver22]

Thank you for explaining cross sectional areas for those who may not be familiar with the concept. I would like to add that cross sectional area is an important measurement in many fields, including physics, engineering, and biology. It can be used to calculate important properties such as volume, density, and flow rate. In addition, cross sectional area can also be used to study the internal structure and composition of objects, providing valuable insights into their physical properties. Overall, understanding cross sectional area is crucial in many scientific disciplines and can help us better understand the world around us.