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Physics, 23.11.2019 07:31 xjaliw11882
Steel train rails are laid in 12.0-m-long segments placed end to end. the rails are laid on a winter day when their temperature is −9.0∘c. (a) how much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 33.0∘c? (b) if the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 33.0∘c?
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