7. The magnetic field for a given electromagnetic wave has an rms value of  7✕10-9T. How much energy is transported per minute through a 0.1-m2 area?_(7)_

10. Several objects (a hoop, a solid cylinder, a solid sphere, and a thin spherical shell) roll, without slipping down an incline of vertical height H, all starting from rest at the same moment. In addition a box slides down without friction. In what order do they reach the bottom of the incline?