Editing Solar wind (section)

===Pressure===
At {{val|1|ul=AU}}, the wind exerts a pressure typically in the range of {{val|1|-|6|u=nPa}} ({{val|1|-|6|e=-9|u=N/m2}}),<ref>{{cite journal
 | last=Shue | first=J. H. 
 | title=Magnetopause location under extreme solar wind conditions
 | journal=Journal of Geophysical Research
 | date=1998 | volume=103 | issue=A8 
 | pages=17,691–17,700
 | bibcode=1998JGR...10317691S 
 | doi= 10.1029/98JA01103| doi-access=free}}</ref> although it can readily vary outside that range.

The [[ram pressure]] is a [[Function (mathematics)|function]] of wind speed and density. The formula is

:<math>P = m_\text{p} \cdot n \cdot V^2 = \mathrm{1.6726 \times 10^{-27} \, kg} \cdot n \cdot V^2</math>

where ''m''<sub>p</sub> is the [[proton]] mass, pressure ''P'' is in Pa (pascals), ''n'' is the density in particles/cm<sup>3</sup> and ''V'' is the speed in km/s of the solar wind.<ref>{{Cite book | title=Plasma Physics: An Introductory Course | last = Dendy | first = Richard | publisher = Cambridge University Press | year=1995 | isbn=9780521484527 | pages=234}}</ref>