A tape of nominal length 30 m was standardized on the flat at the NPL and found to be 30.0520 m at 20◦C and 44 N of tension. It was then used to measure a reference bay in the catenary and gave a mean distance of 30.5500 m at 15◦C and 88 N tension. As the weight of the tape was unknown, the sag at the mid-point of the tape was?

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S A Nominal length 30m Founded 300520 m at 200 Tension 44N mea... View the full answer