Through the mid-point M of the side CD of a parallelogram ABCD, the line BM is drawn intersecting AC in L and AD produced in E. Prove that EL = 2 BL. | Shaalaa.com
Through the mid-point M of the side CD of a parallelogram ABCD, the li…
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shaalaa.com
@xyz.abcd.st on Instagram: "🇯🇵 当达到这种速度时，已经不再是地面移动，而是以音速前进 🚀🌍 这段模拟展示了如果以 马赫 1（约 1330 公里/小时）的速度乘坐超音速列车穿越日本，会是一种怎样的体验。 目前，日本最快的列车运行速度约为 320 公里/小时，而在如超高速 磁悬浮列车 等先进实验平台上，在受控环境中已经实现了 超过 600 公里/小时 的速度。这一模拟远远超出了现有水平，探索当现代铁路概念进化为真正的超高速系统时，未来将具备怎样的可能性。 要达到这样的速度，仅靠动力是远远不够的。工程师们正在研究 磁悬浮技术、几乎零摩擦的导轨，以及 真空或低压管道系统，以消除超高速运行中最大的限制因素——空气阻力。在马赫级别的速度下，哪怕是微小的空气扰动，也会成为严峻的结构性挑战。 因此，未来的超音速铁路构想将依赖于 高精度导向系统、AI 控制的稳定技术，以及在 数百公里范围内以毫米级误差建造的基础设施。 一旦实现，如今需要数小时的行程将被缩短到几分钟，这可能从根本上改变 通勤方式、区域经济，以及 大型城市之间的连接方式。 你喜欢科技吗？ #科技 #创新
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@xyz.abcd.st on Instagram: "🇯🇵 当达到这种速度时，已经不再是地面移动…
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