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zmey [24]
4 years ago
7

How long does it take to change a flat plain into mountains? help

Physics
2 answers:
Len [333]4 years ago
5 0
Im not for sure but i think it takes a couple hundred years (or according to the climate)
Aleksandr-060686 [28]4 years ago
4 0
I think that it's more than we can imagine. There are some scientists say that the biggest desert in the world was a huge ocean thousands years ago!!! The face of Earth is the knowledge we are not so sure now. (Maybe we'll never know) Earth is changing little by little, day by day.……
It do really takes more than everything we can imagine ……
Maybe thousands of years later, someone could find out my cellphone ……(My iPhone 5s, it's already missing for months!!! )
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The San Andreas Fault in California exists along a _____ plate boundary.
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HELP NEEDED! Determine the mechanical energy of this object: a 1-kg ball rolls on the ground at 2 m/s.
valentina_108 [34]
The mechanical energy of an object is the sum of its potential and kinetic energy.

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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
Mila [183]

Explanation:

Formula to determine the critical crack is as follows.

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

  \gamma = 1,     K_{IC} = 24.1

  [/tex]\sigma_{y}[/tex] = 570

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

                       = 427.5

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}

       = 10.13 \times 10^{-4}

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}.

4 0
3 years ago
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