TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 74.0 kg physicist placed himself and 400 kg of equipment at the top of one 610 m high antenna to perform gravity experiments. By how much (in mm) was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.180 m in radius? (Assume a Young's modulus of 20 x 1010 Pa.) 1.3919E-4 X mm
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 74.0 kg physicist placed himself and 400 kg of equipment at the top of one 610 m high antenna to perform gravity experiments. By how much (in mm) was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.180 m in radius? (Assume a Young's modulus of 20 x 1010 Pa.) 1.3919E-4 X mm
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Transcribed Image Text:TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 74.0 kg physicist placed himself and 400 kg of equipment at the top of one 610 m
high antenna to perform gravity experiments. By how much (in mm) 'was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.180 m
in radius? (Assume a Young's modulus of 20 × 10¹0 Pa.)
1.3919E-4 X mm
A copper wire of diameter 1.2 cm stretches 0.02% when it is used to lift a load upward with an acceleration of 2.1 m/s². What is the weight of the load (in kN)?
X KN
217.945
+
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