Sphere????

Question

hi

I know very well that circle has a uniform radius "r".
Our earth is a sphere. Actually sphere is not a circle. Am i right?

And in my study syllabus i read sphere has a radius. How is that the radius may be different in different place.

Answer 1

A sphere is simply a circle in three dimensions. Imagine a circle as being on a piece of paper that is zero inches thick. Now to imagine a sphere, imagine a point in the air. Now imagine all points that are distance 'r' from that point in the air. That is a sphere.

Answer 2

A sphere is a three-dimensional version of the two-dimensional circle. A sphere does indeed have a uniform radius: every point on the sphere's surface is the same distance from the center of the sphere.

For practical purposes, the earth is a sphere. If you get picky, you can quibble about mountain ranges and such, but if you shrunk the earth to billiard ball size it would be smoother than any billiard ball.

Hopefully that helps!

Answer 3

the sphere won't be able to be a 0 dimensional element because of the fact it violates undertaking selection 4 and a million. a 0 dimensional element has no length, no width, and no intensity, it does not occupy area hence it could no longer occupy the two time or area. additionally, if it is 0 dimensional then this violates the mathematical ratio of the sphere, it is ?. everywhere on the sphere, the ratio of the circumference to the diameter is ? it is impossible for a 0 dimensional element, hence this removes this posit as a proof. to make certain that the sphere to be thoroughly flat we nonetheless can no longer violate this mathematical relation because of the fact it is often around. the only way for the sphere to be around and flat is that if an merchandise can shuttle to the left facet and finally end up on the surprising facet, style of like interior the sport "asteroids" the place the deliver travels alongside a 2 dimensional plane, yet by no ability falls off because of the fact it is a 2 dimensional sphere (nicely, the exterior is) and on a sphere you are able to bypass in one direction and finally end up on a similar element. it is the only way wherein a sphere would be "flat" at any length different than 0 is that if the climate are a fashion or the different appropriate by an extra length, yet given the circumstances one might degree a curvature to the exterior. So, relative to an exterior observer the exterior might seem to be flat, yet for all of us on the exterior, they might degree a curvature. This sphere is hypothetically existent interior the universe and there is no longer something interior the regulations of physics that denies extra dimensions or bigger dimensional passage techniques inclusive of wormholes that would desire to benefit a 2 dimensional plane the features of a sphere. Very exciting question by the way, it is possibly the 1st question at right here that made me think of this plenty. 10 trillion circumstances extra effective than the "2012" questions relating to right here. is that this surprising?

Answer 4

Of course the earth is not flat but it is flattened at the poles perhaps because it is spinning and also because of the affects of the sun and moon's gravity. The radii will be different from the center of the earth to the flattened poles, bulged equator or tallest mountains. A perfect sphere is a three dimensional object that could be generated by rotating a perfect circle 360 degrees. Also, if you cut the sphere exactly in half (anywhere) the halves will form perfect circles.

Answer 5

a sphere is a 3-D circle (it's a circle with a volume)

if it's a perfect sphere then it will only have one radius, but if it is slightly flat (like the earth) then it will have different values for the radius as the distance from the core to the circumference would differ....

Answer 6

A sphere is not a circle.

The Earth is not a perfect sphere - it has distortions.

The radius is the measurement from the center to the exterior, since the Earth is not a perfect sphere, it will have different radii in different places.

Answer 7

sphere is a three dimensional figure, like ur cricket ball, having same radius everywhere. our earth is like a sphere but not exactly a sphere, as it is slightly tapered at middle and like an orange shape. so what u have read is true that sphere has same radius for every direction.

Answer 8

A sphere is a 3 dimensional circle.

Answer 9

the earth is not a perfect sphere, that's why it's radius differs from place to place

Answer 10

first the earth isnt a sphere due to its rotation the earth is an oblate spheroid

a sphere has a constant distance from the center in all directions