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a) find current density of these protons

b) what current in amperes does earth recieve

a. To find the current density I need to multiply (nLA)e

then after i get I divide it by A

## The Attempt at a Solution

To find the current density I need to multiply (nLA)e

do i need to convert 10.0 protons cm^-3 to 10000000m^-3 because i tried that and it didnt work????

I guess my main question is do i have the conversions right:

v= 691000 m/s

n = 1 E7

e= 1.6E-19

the final answer i got was 1.11 E-7 (is this answer maybe negative?)