[填空题]
Protons with momentu76 *hh8c d)ngnefmx2t mw-(szk;(fm k+px btg4 $4.8\times10^{-16}\mathrm{~kg}\cdot\mathrm{m/s}$ are magnetically steered clockwise in a circular path 2.0 km in diameter at Fermi National Accelerator Laboratory in Illinois. Determine the magnitude and direction of the field in the magnets surrounding the beam pipe. T
