7 articles trouvés pour ce sujet.
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Un empilement de spheres |
2002-04-16 |
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Sébastien pose la question :
Lorsque j'etais encore a l'universite je me souviens qu'un prof nous avez dit, sans le demontrer (ce n'est pas bien du tout de sa part) que l'espace minimal qui existe dans un empilement de spheres est de l'ordre de 26% Voici plusieurs jours que je cherche a resoudre ce probleme de geometrie, et je n'arrive meme pas a trouver comment l'aborder.
Claude Tardif lui répond. |
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7 spheres on a hexagonal tray |
2019-01-14 |
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herm pose la question :
what is the length of each side of a hexagonal tray, with the height of each side 0.75 inch, to hold seven spheres, each with a diameter of 3.00 inches? The spheres are placed such that each side of the hexagon is touched by one sphere at its midpoint (and the seventh sphere is place in the center of the "ring" of the other six spheres.
Harley Weston lui répond. |
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Packing spheres in a given region |
2010-01-27 |
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MISAEL pose la question :
IN A VOLUME GENERATED BY TWO TRAPEZOIDS WITH DIFFERENT SURFACE AREAS BUT SHARING THE BOTTOM PLANE:
HOW CAN I CALCULATE THE "N" SPHERES WHICH THIS VOLUME CAN CONTAIN?
HOW CAN I CALCULATE THE VOLUME OF SPACES IN RELATIONSHIP WITH VOLUME OF SPHERES OR THE TOTAL VOLUME?
Robert Dawson lui répond. |
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Shapes |
2005-11-12 |
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Tonya and Hailey pose la question :
MY THIRD GRADERS TEACHER HAS SENT HOME HOMEWORK ASKING FOR THEM TO FIND REAL-WORLD OBJECT IN MANY DIFFERENTS SHAPES A FEW HAVE US STUMPED
Penny Nom lui répond. |
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A sphere inscribed in a cone |
2003-08-10 |
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A student pose la question :
A sphere with radius 5cm is inscribed in a right circular cone 20 cm in height.find
(a) the base radius ,volume of the cone
(b)volume of the shaded space( to 3 sig fig)
Penny Nom lui répond. |
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A set of points in space |
2002-03-18 |
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Victoria pose la question :
Describe the given set with a single equation or a pair of equations: The set of points in space that lie 2 units from the point(0,0,1) and at the same time 2 units from the point (0,0,-1).
Penny Nom lui répond. |
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Three Spheres |
1997-01-14 |
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Alan Schnerch pose la question :
Three spheres of diameter 2 are placed on a level surface so that each sphere touches the other two. A fourth sphere, also of diameter 2, is placed on top of the other three so that it touches all of the other spheres. The distance from the level surface to the highest point of the top sphere is . . ..
Chris Fisher and Harley Weston lui répond. |
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