Question

Data: Air at p = 1 atm enters a thin walled (D = 5mm diameter) long tube (L = 2 in) at an inlet temperature of Tmr100 °C. A constant heat flux is applied to the air from the tube surface. The mass flow rate of air is in = 135x le kg/s.
Properties of air (at 400 K): g = 230.1x10-7 N.s/m2, Pr = 0.690, k = 0.0338 W/m.K, Cp = 1014 J/kg.K

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

data is The 7 Unsolved Mathematical Problems

Poincaré Conjecture.

Birch and Swinnerton-Dyer Conjecture.

Hodge Conjecture.

Navier–Stokes Existence and Smoothness.

P Versus NP Problem.

Riemann Hypothesis.

Yang-Mills Existence and Mass Gap.

Explanation:

What is the 1 million dollar math problem?

To date, the only Millennium Prize problem to have been solved is the Poincaré conjecture, which was solved in 2003 by the Russian mathematician Grigori Perelman. He declined the