Re: 29,412 cubic inches of stones.
Michael B
4y
2,495
- Since we learn in 3rd grade that the Volume of a sphere is 4/3(Pi)(r^3), w...
*Hveragerthi*4y 2,373- Childish semantics to avoid your lack of scientific knowledge. Asteroids are oft...
*#143595*4y 2,220- Childish semantics to avoid your lack of scientific knowledge. Asteroids a...
*Hveragerthi*4y 2,589 Hveragerthi**Date:**9/14/2011 12:41:42 AM ( 4y ago )**Hits:****2589**
Childish semantics to avoid your lack of scientific knowledge. Asteroids are often referred to as spheres even though they are irregularly shaped and oblong or ovate. However measuring an oval is only one additional step, (L+W)divide by 2, to that of a sphere, so obviously the final sum is very similar in volume and close enough to demonstrate the preposterous nature of your original statement. **Again you should have looked up the definition of sphere before making yourself look more foolish:**http://en.wikipedia.org/wiki/Sphere "A **sphere**(from Greek*σφαῖρα*—*sphaira*, "globe, ball") is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a perfect sphere is completely symmetrical around its center, with all points on the surface lying the same distance*r*from the center point."
"Eleven properties of the sphere In their book *Geometry and the imagination*^{[4]}David Hilbert and Stephan Cohn-Vossen describe eleven properties of the sphere and discuss whether these properties uniquely determine the sphere. Several properties hold for the plane which can be thought of as a sphere with infinite radius. These properties are:*The points on the sphere are all the same distance from a fixed point. Also, the ratio of the distance of its points from two fixed points is constant.*- The first part is the usual definition of the sphere and determines it uniquely. The second part can be easily deduced and follows a similar result of Apollonius of Perga for the circle. This second part also holds for the plane.
*The contours and plane sections of the sphere are circles.*- This property defines the sphere uniquely.
*The sphere has constant width and constant girth.*- The width of a surface is the distance between pairs of parallel tangent planes. There are numerous other closed convex surfaces which have constant width, for example the Meissner body. The girth of a surface is the circumference of the boundary of its orthogonal projection on to a plane. It can be proved that each of these properties implies the other.
- The width of a surface is the distance between pairs of parallel tangent planes. There are numerous other closed convex surfaces which have constant width, for example the Meissner body. The girth of a surface is the circumference of the boundary of its orthogonal projection on to a plane. It can be proved that each of these properties implies the other.
*All points of a sphere are umbilics.*- At any point on a surface we can find a normal direction which is at right angles to the surface, for the sphere these are the lines radiating out from the center of the sphere. The intersection of a plane containing the normal with the surface will form a curve called a
*normal section*and the curvature of this curve is the*sectional curvature*. For most points on most surfaces, different sections will have different curvatures; the maximum and minimum values of these are called the principal curvatures. It can be proved that any closed surface will have at least four points called*umbilical points*. At an umbilic all the sectional curvatures are equal; in particular the principal curvatures are equal. Umbilical points can be thought of as the points where the surface is closely approximated by a sphere. - For the sphere the curvatures of all normal sections are equal, so every point is an umbilic. The sphere and plane are the only surfaces with this property.
- At any point on a surface we can find a normal direction which is at right angles to the surface, for the sphere these are the lines radiating out from the center of the sphere. The intersection of a plane containing the normal with the surface will form a curve called a
*The sphere does not have a surface of centers.*- For a given normal section there is a circle whose curvature is the same as the sectional curvature, is tangent to the surface and whose center lines along on the normal line. Take the two centers corresponding to the maximum and minimum sectional curvatures: these are called the
*focal points*, and the set of all such centers forms the focal surface. - For most surfaces the focal surface forms two sheets each of which is a surface and which come together at umbilical points. There are a number of special cases. For channel surfaces one sheet forms a curve and the other sheet is a surface; For cones, cylinders, toruses and cyclides both sheets form curves. For the sphere the center of every osculating circle is at the center of the sphere and the focal surface forms a single point. This is a unique property of the sphere.
- For a given normal section there is a circle whose curvature is the same as the sectional curvature, is tangent to the surface and whose center lines along on the normal line. Take the two centers corresponding to the maximum and minimum sectional curvatures: these are called the
*All geodesics of the sphere are closed curves.*- Geodesics are curves on a surface which give the shortest distance between two points. They are a generalization of the concept of a straight line in the plane. For the sphere the geodesics are great circles. There are many other surfaces with this property.
*Of all the solids having a given volume, the sphere is the one with the smallest surface area; of all solids having a given surface area, the sphere is the one having the greatest volume.*- These properties define the sphere uniquely. These properties can be seen by observing soap bubbles. A soap bubble will enclose a fixed volume and due to surface tension its surface area is minimal for that volume. This is why a free floating soap bubble approximates a sphere (though external forces such as gravity will distort the bubble's shape slightly).
*The sphere has the smallest total mean curvature among all convex solids with a given surface area.*- The mean curvature is the average of the two principal curvatures and as these are constant at all points of the sphere then so is the mean curvature.
*The sphere has constant positive mean curvature.*- The sphere is the only imbedded surface without boundary or singularities with constant positive mean curvature. There are other immersed surfaces with constant mean curvature. The minimal surfaces have zero mean curvature.
*The sphere has constant positive Gaussian curvature.*- Gaussian curvature is the product of the two principal curvatures. It is an intrinsic property which can be determined by measuring length and angles and does not depend on the way the surface is embedded in space. Hence, bending a surface will not alter the Gaussian curvature and other surfaces with constant positive Gaussian curvature can be obtained by cutting a small slit in the sphere and bending it. All these other surfaces would have boundaries and the sphere is the only surface without boundary with constant positive Gaussian curvature. The pseudosphere is an example of a surface with constant negative Gaussian curvature.
*The sphere is transformed into itself by a three-parameter family of rigid motions.*- Consider a unit sphere placed at the origin, a rotation around the
*x*,*y*or*z*axis will map the sphere onto itself, indeed any rotation about a line through the origin can be expressed as a combination of rotations around the three coordinate axis, see Euler angles. Thus there is a three-parameter family of rotations which transform the sphere onto itself, this is the rotation group,**SO(3)**. The plane is the only other surface with a three-parameter family of transformations (translations along the*x*and*y*axis and rotations around the origin). Circular cylinders are the only surfaces with two-parameter families of rigid motions and the surfaces of revolution and helicoids are the only surfaces with a one-parameter family."
- Consider a unit sphere placed at the origin, a rotation around the
**We are talking about geometry, not astonomy so you are showing even more of your ignorance on the subject unless you think you are passing ateroids during your "flushes". Being that I am a big meteorite collector I have also studied asteroids quite extensively. I have yet to hear of any asteroid to fit the 11 properties of a geometric sphere. Altering definitions to fit your needs just shows how little you really know and how desperate you really are. The same goes for all the people who pressed "agree" for your post.****More on the definition of sphere is relation to geometry, which is what is being discussed:**http://dictionary.reference.com/browse/sphere " ## spherenoun, verb, sphered,spher·ing.noun1.Geometry .a.a solid geometric figure generated by the revolution of asemicircle about its diameter;a round body whosesurface is at all points equidistant from the center. Equation:x^{2 }+ y^{2 }+ z^{2 }= r^{2 }."
http://www.answers.com/topic/sphere *n.**Mathematics*. A three-dimensional surface, all points of which are equidistant from a fixed point."
**If you are going to keep trying to dig yourself out of the deep hole you have dug yourself in to let me give you a tip. Digging yourself in deeper by trying desperately to change definitons to meet your needs is not going to do it. Again, we are talking about geometry and how it applies to volume, not heavenly bodies. Just like "sphere" can also be defined as a person's extent of knowledge. For example, your sphere of knowlege when it comes to "liver flushing" and science is null. So going from a geometric equation for "sphere" to astrological bodies also referred to as "spheres" just shows complete desperation due to a lack of knowledge on the subject!!!**
- LMAOROTF! I can tell you didn’t understand a word I said. Cutting + pasting your...
*#143595*4y 2,123 - Re:
*#68716*4y 2,212 - Re: 29,412 cubic inches of stones.
*Michael B*4y 2,182
- Childish semantics to avoid your lack of scientific knowledge. Asteroids a...
- "Being that I at least know what a sphere is" ... ... Slow down gen...
*Michael B*4y 2,017
- Childish semantics to avoid your lack of scientific knowledge. Asteroids are oft...
- Ok, I followed you as far as calculating the 90.8 cc of stones. Assuming the sto...
*dmom*4y 2,193- "I just hate to see math abused as badly as you have done here." ... ...
*Michael B*4y 2,411 - The jury is not out for me dmom.Ten years ago I was in acute pain and told my in...
*#143595*4y 2,041 - Ok, I followed you as far as calculating the 90.8 cc of stones. Assuming t...
*Hveragerthi*4y 2,408
- "I just hate to see math abused as badly as you have done here." ... ...
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