An airplane of a certain density and shape flies at a constant speed. To do so, it must fly with a certain velocity $v_0$. If the size of the airplane is scaled up in length, width, and height by a factor of two, it can only fly above a new velocity $v_1$. What is $v_1/v_0$?

**Details and assumptions**

- The mass density and relative proportions of the airplane are unchanged - it's just bigger.
- Assume the wings work solely by the Bernoulli effect.

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