Physics, 16.11.2019 02:31, saintsfan2004

When you start to construct a prototype machine, you find it is difficult to produce a 0.25-t magnetic field over such a large area. if you decrease the length of the bar to 0.20 m while leaving b, v, and r the same as in part a, what will be the power required of the person? express your answer using two significant figures.

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When you start to construct a prototype machine, you find it is difficult to produce a 0.25-t magnet...