The magnetic field in the figure is decreasing at the rate 0…

The magnetic field in the figure is decreasing at the rate 0.45 T/s.  (e = 1.60 x10-19 C, mproton = 1.67×10-27 kg) a) What is the magnitude of the acceleration of a proton at rest at point a? What is the direction of acceleration of point a? b) What is the magnitude of the acceleration of a proton at rest at point d? What is the direction of acceleration of point d?

Radio astronomers detect electromagnetic radiation at 45.0 M…

Radio astronomers detect electromagnetic radiation at 45.0 MHz from an interstellar gas cloud. They suspect this radiation is emitted by electrons spiraling in a magnetic field. (me=9.11×10-31 kg, e-=1.60×10-19C) What is the magnetic field strength inside the gas cloud?