ch26_p8 - 8(a Since 1 cm3 = 106 m3 the magnitude of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
8. (a) Since 1 cm 3 = 10 –6 m 3 , the magnitude of the current density vector is Jn e v == F H G I K J ×× = × −− 870 10 160 10 470 10 654 10 6 19 3 7 . .. . m Cm / s A / m 3 2 c hc h (b) Although the total surface area of Earth is 4 2 π R E (that of a sphere), the area to be used in a computation of how many protons in an approximately unidirectional beam (the solar wind) will be captured by Earth is its projected area. In other words, for the beam, the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online