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course:interesting_problems:2026:topic10:start [2025/07/15 15:27] whyx 创建 |
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| If you release sand or similar granular material in a container filled with water, the material will sink to the bottom and may form a crater-like structure. Explain and investigate the phenomenon. | If you release sand or similar granular material in a container filled with water, the material will sink to the bottom and may form a crater-like structure. Explain and investigate the phenomenon. | ||