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Some slack (Posted on 2018-10-29) Difficulty: 2 of 5
Imagine a string tied tightly around Earth’s circular equator (of radius about 6400 km) and then add 1 m of extra length to it. Pinch it at a point and lift it up from the surface. How high can you lift it?

See The Solution Submitted by Steven Lord    
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  Subject Author Date
SolutionSolutionKenny M2018-10-29 21:22:39
Solutionmy solutionCharlie2018-10-29 10:26:14
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