1. The taped distance of a line was 99.812 m using a 100 m steel tape weighing 2 kg at a pull of 10 kg, and temp of 32°C. The difference in elevation between end points is 45 cm. The tape is exactly 100 m at a temperature of 28°C and standard pull of 10 kg. If the coefficient of expansion of the tape is 0.0000118°C and the tape was supported at 25 m intervals during measurement find the correct horizontal distance of the line.

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.