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Math Help - linear surveying

  1. #1
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    Smile linear surveying

    1. a certain steel tape, for which the coefficient of expansion is 0.00000645, is exactly 100 feet long at 68 fahrenheit. At 15 fahrenheit the length of the tape is
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  2. #2
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    Look under "thermal expansion coefficient" in the link below - you should be able to construct an equation and get your answer. Basically the coefficient = [(change in length) / (change in temp)] / original length

    Coefficient of thermal expansion - Wikipedia, the free encyclopedia
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  3. #3
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    Perth
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    temp correction of steel tape

    C=k(T1-T)L
    C= correction in legth
    k=thermal coefficient of expansion
    T1=tape temp at time of measurement ie (15 deg)
    T=tape temp when it has standard length (68 deg)
    L= recorded measurement(100 ft)

    Therefore
    length of tape at 15 degrees = L+C
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