Video shows manhole explode | CNN
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Video shows manhole explode | CNN
2017年4月3日
CNN
The Manhole Cover That Almost Reached Space Enter the high-speed mystery of Pascal‑B. In August 1957, during the Operation Plumbbob nuclear test series at the Nevada Test Site, a massive steel cap (commonly referred to as a “manhole cover”) was blasted off a shaft by a shock-wave caused by the underground detonation. Camera footage captured the cap only for a single frame—leading to speculative estimates that it reached velocities exceeding 60 km/s (≈216,000 km/h)—many times Earth's escape veloc
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Manhole explodes after boy tries to put lit fireworks through the cover A manhole exploded after a boy put lit fireworks over the seal, igniting trapped methane from the sewer in a city in northern China. The dramatic video, filmed in Chifeng City in Inner Mongolia on January 30, shows a boy trying to put some lit fireworks through the manhole cover and it violently exploding. White smoke can be seen bursting out of the manhole while the cover and the bricks around it are sent flying, leaving a
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It takes a lot of force to throw a 2-ton car on its side, but a manhole cover blown out of the street can do it. What causes these manhole missiles? | Science Channel
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