Задача id17119

Mercury flows through a pipe with conducting walls 5 cm in diameter at a speed of 20 cm/s. The pipe is placed in the gap between the poles of the electromagnet, where a magnetic field with an induction of 0.6 Tesla is created. Will a magnetic field affect the coefficient of hydraulic friction? The electrical conductivity of mercury is 106 Ohm-1 m-1.

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