TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 79-kg physicist placed himself and 392 kg of equipment at the top of a 556-m-high antenna to perform gravity experiments. By how much was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.33 m in radius?
Compression:
Strain:
Stress under force F=(m+M)g:
So, combine this to get the compression:
*Young's modulus of steel is
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