Electrons in Earth's upper atmosphere have typical speeds near 5.78 ✕ 105 m/s. (a)
Calculate the magnitude of Earth's magnetic field if an electron's velocity is perpendicular to the magnetic field and its circular path has a radius of 6.79 ✕ 10−2 m.
(b)
Calculate the number of times per second that an electron circles around a magnetic field line.​

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

c. magnitude and direction

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.