ch26-p010 - 10. (a) Since 1 cm3 = 106 m3, the magnitude of...

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10. (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
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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