sand
2020-11-10 0:10
世界上最软的沙子是什么？为什么有些沙子比其他沙子软？
这听起来可能很荒谬，但这是真的。了解沙子等颗粒状物质的流动是物理学中一个尚未解决的重大问题。
如果你建造一个沙漏，并用已知大小和形状的沙粒填充它，没有公式可以可靠地预测沙子流过沙漏需要多长时间，或者它是否会流动。你必须试一试。
北卡罗来纳州立大学(North Ca......
2020-9-23 23:30
你喜欢在多沙的地方生活或旅行吗？热带海滩，起伏的沙丘，或者可能是工作的沙漠。无论你的沙地目的地在哪里，都要警惕在沙地上驾车的挑战。加入“挖掘俱乐部”的人太多了，这是一个你宁愿避开的俱乐部。
请注意，这是普通的沙子驾驶，而不是沙漠驾驶，尽管许多基本原则都是相同的，但沙漠驾驶本身就是一个“漫长的”讨论。
本内容由可解释性......
2011-8-26 10:51
Boundless creativity, more panoramic than a panoramic photo!
2011-8-1 11:7
The 7.23 Wenzhou EMU accident is gradually "fading" away, like smoke. This work is dedicated to those who lost their lives in the 7.23 accident. Rest in peace,......
2011-7-22 10:37
The Huaxia land gives birth to the giant Yao, a rising star who embarks on distant expeditions across the ocean. On the court, he dominates and towers over all......
2011-7-15 10:41
The snowflake uses the bottle to travel thousands of miles to meet the sand, but the sand is bound to sink, and the snow will also melt. The tragic and beautif......
2011-4-2 19:33
The first time I edited the video, I didn't do a good job and the segment of two-finger brick breaking was edited out. I will record some more, like iron palm ......
2011-3-15 11:52
In the face of enormous natural disasters, humans are so fragile. It has been over 90 hours since the mega earthquake and tsunami in Japan. Let us pray togethe......
2007-5-25 14:6
It's supposed to be an exhibition. It's just a bunch of drawings.
But those sand sculptures are really good.
2006-7-29 3:2
I've been thinking that we must provide users with a tangible service, making them feel that diglog is useful. Only then can we retain users and move forward. ......