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Tom [10]
4 years ago
5

Suppose your bathroom scale reads your mass as 60 kg, with a 4% uncertainty. what is the uncertainty in your mass in kilograms?

Physics
1 answer:
Vanyuwa [196]4 years ago
4 0

To solve for the uncertainty of your mass in kilograms, simply multiply your total mass with the percent uncertainty.

We know that 4% = 0.04, therefore:

uncertainty = 60 kg * 0.04

uncertainty = 2.4 kg

 

However since uncertainty covers the upper and lower region, therefore correct answer must be:

<span>± 2.4 kg</span>

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Determine the critical crack length for a through crack contained within a thick plate of 7150-T651 aluminum alloy that is in un
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Explanation:

Formula to determine the critical crack is as follows.

          K_{IC} = \gamma \sigma_{f} \sqrt{\pi \times a}

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  [/tex]\sigma_{y}[/tex] = 570

and,   \sigma_{f} = 570 \times \frac{3}{4}

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Hence, we will calculate the critical crack length as follows.

      a = \frac{1}{\pi} \times (\frac{K_{IC}}{\sigma_{f}})^{2}

        = \frac{1}{3.14} \times (\frac{24.1}{427.5})^{2}

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Therefore, largest size is as follows.

            Largest size = 2a

                                 = 2 \times 10.13 \times 10^{-4}

                                 = 20.26 \times 10^{-4}

Thus, we can conclude that the critical crack length for a through crack contained within the given plate is 20.26 \times 10^{-4}.

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