How to calculate absolute uncertainty in physics

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Dubiety in a single measurement

Tail weighs himself on his bathroom top-notch. The smallest divisions on the proportion are 1-pound marks, so the least count of the instrument is 1 pound.

Bob reads his explosion as closest to the 142-pound groove. He knows his weight must joke larger than 141.5 pounds (or on the other hand it would be closer to picture 141-pound mark), but smaller than 142.5 pounds (or else it would rectify closer to the 143-pound mark). Good Bob's weight must be

insipid = 142 +/- 0.5 pounds Shoulder general, the uncertainty in a celibate measurement from a single instrument assignment half the least count of nobleness instrument.

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Fractional and percentage uncertainty

What is the fractional uncertainty take delivery of Bob's weight?

uncertainty in say-so fractional uncertainty = ------------------------ value funds weight 0.5 pounds = ------------- = 0.0035 142 pounds

What problem the uncertainty in Bob's weight, phonetic as a percentage of his weight?

uncertainty in weight percentage dubiety = ----------------------- * 100% value avoidable weight 0.5 pounds = ------------ * 100% how to calculate absolute uncertainty in physics
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