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anonymous
 4 years ago
A pipe is measured once with a steel tape with markings every .1mm.The two ends of the pipe line up with the 0 and 40m marks onthe tape. How should this datum be recorded using theappropriate number of significant figures?
anonymous
 4 years ago
A pipe is measured once with a steel tape with markings every .1mm.The two ends of the pipe line up with the 0 and 40m marks onthe tape. How should this datum be recorded using theappropriate number of significant figures?

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0well bet cause the smallest division is .1mm you would divide that by 2 so you would get + or  .05mm so I'm almost positive it should be to 40.00 and 0.00

mathmate
 4 years ago
Best ResponseYou've already chosen the best response.0That is correct, i.e. 40\(\pm\) 0.00005 m, assuming the operator has excellent eyesight. Do note that a temperature deviation of 1 degree changes by about 0.00044 m over the 40m. length. Also, all tapes have rated tensions when measuring. Any deviation of 1 kg force on the tension can lead easily to an error of 0.00050m over the 40 m. length. (if tape is made of steel. If it is nylon, the error is MUCH higher). Therefore the given measurement has to be taken under extremely controlled conditions to get the calculated accuracy. ALternatively, environmental errors have to be corrected. They are 10100 times greater than the graduation error.
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