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use equation

use equation

use equation

use equation

1

If now I use equation number six, then I find the period , and I find that it takes about 31 hours for this object to go around the Earth .

如果现在用方程，可以算出周期，答案是物体绕地球一圈，要花费 31个小时。

3

We can use equation (5 ) to calculated shear modulus directly .

这样我们就可以直接用公式（5 ）来计算剪切模量。

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