aWe are coloring the edges of a cube one-by-one. At the beginning none of the edges is colored, and in every step we may color only an edge that is not in contact with a colored edge. How many edges can you color this way the most? 我们上色立方体的边缘逐个。 在开始边缘都没有被...
(a) A cube has edges of length n, where n is an integer. Three faces, meeting at a corner, are painted red. The cube is then cut into n3 smaller cubes of unit length. If exactly 125 of these cubes have no faces painted red, determine the value of n.(b) In the isosceles trapez...
On the other handwe show that the $\delta$--$M^*$--convolution body of the $n$--dimensional cubeis homothetic to the unit ball of $\ell_1^n$. 关键词: Mathematics - Metric Geometry DOI: 10.48550/arXiv.math/9605217 被引量: 1 年份: 1998 ...
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So what's the total surface area of these 20 cuboids?20m^2 答案 答案见上相关推荐 12. There is a cube with edges of 1 meterlong. Now we cut t into 4 parts in the horizontaldirection, and then cut each part into 5 cuboids. In this way, we altogether get 20cuboids. So what's ...
4. A slice is taken off a cube. Again, how many more edges, vertices and faces are there?3,2, 1 5. Try changing a cube in other ways and in each case check whether Euler's formul a still holds. Yes 相关知识点: 试题来源: 解析 3,2, 1Yes ...
The angle between a diagonal of a cube and one of its edges is: A. 30 degrees B. 45 degrees C. 60 degrees D. None of the above 相关知识点: 试题来源: 解析 D。正方体的体对角线与棱的夹角不能直接得出,需要通过空间向量等知识计算,此题答案为 None of the above。反馈 收藏 ...
B. Wasserstein, "Cube-edges of uraninite as a criterion of age", Nature, v. 166, p. 380, 1951.Wasserstein, B.: Cube edges of uraninites as a criterion of age? Nature 168, 380 (1951).B. Wasserstein, “Cube-Edges of Uraninite as a Criterion of Age,” Nature, Vol. 168, No...
A cube with 3-inch edges is made using 27 cubes with 1-inch edges. Nineteen of the smaller cubes are white and eight are black. If the eight black cubes are placed at the corners of the larger cube, what fraction of the surface area of the larger cube is white?( ). A. 19 B. ...
The enormous magnitude of 2 billion tons of alloys produced per year demands a change in design philosophy to make materials environmentally, economically, and socially more sustainable. This disqualifies the use of critical elements that are rare or have questionable origin. Amongst the major alloy ...