# physics

Each side of a metal cube is measured to be 2.0 cm ±0.20 cm. What is the absolute uncertainty in the calculated volume of the cube?

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1. The relative uncertainty in x^n is n times the relative uncertainty in x.
the relataive uncertainity in the above is 10 percent, so the relative uncertainity in the volume is 30 percent
Volume=8.0+-2.4 cm^3
absolute uncertainity=4.8 cm^3

another way:
high volume-low volume
2.2^3-1.8^3= 4.8cm^3

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bobpursley

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3. the answer is not 4.8

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