The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.491 m and outer radius of 0.762 m. The toroid has 691 turns turns of wire, each of which carries a current of 8.66 kA. Find the magnetic field strength along the inner radius.

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If a simple machine reduces the strength of a force, what must be increased?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f