mg1=GmM/R1² = 30 H (на поверхности Земли)
mg2=GmM/R2²=15 H
R2=R1√2=6400*1.41=9050 км
высота h=R2-R1=9050-6400=2650 км
решение на фото \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
А'=νRT=1*8.31*72=598.32 Дж