How do you calculate the cross sectional area of a tube?

Answer 1

The volume of a sphere refers to the number of cubic units that will exactly fill a sphere. Its metric unit is the liter.

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You can also use cubic linear dimensions (cubic metre and its divisions), depending really on what is the most sensible for the application.

Answer 2

Put it in a tub with milliliter and liter markings, and measure how much is in there without the globe. Then put the globe in, and measure it again. Subtract the measure with the globe in to the measure without it, and convert mL to cm3. (1 mL = 1 cm3)

Answer 3

If I am correctly understanding the question. You are simply looking for the area of a circle or pi * R^2 or pi/4 * D^2. ------------------------------------ The formula above is correct for the planar cross section area through the center of the sphere, where the constant pi = 3.14159.... and R is the radius of the sphere, and D is the diameter. If the plane you are interested in does not go through the center of the sphere, it is not correct. To get the area though a plane that does not go through the center, you need to know the offset distance of the plane from the center of the sphere. Calling this distance d, the area is A = pi * (R^2 - d^2) [Positive values only. If the answer comes out negative, the offset distance is greater than the radius of the sphere, so the plane does not intersect the sphere] This can be derrived from a simple 2-D diagram.

Answer 4

AREA = PI times (Outer diameter squared minus inner diameter squared ) divided by 4

For very thin tubes, area is also calculated as PI times average DIAMETER times tube thickness. But the first formula above is exact.

Answer 5

The surface area of a sphere whose radius is 'R' is [ 4 pi R2 ].

Answer 6

Surface area of a sphere = 4*pi*radius2 measured in square units.