[tex]v_{Z} = 30\frac{km}{s} \ - \ przyblizona \ predkosc \ Ziemi\\\\a)\\dla \ \ t = 5 \ min = 5\cdot60 \ s = 300 \ s\\\\s = v\cdot t\\\\s = 20\frac{km}{s}\cdot300 \ s\\\\\underline{s = 9 \ 000 \ km}[/tex]
[tex]b)\\dla \ \ t = 7 \ h = 7\cdot3600 \ s = 25 \ 200 \ s\\\\s=v\cdot t\\\\s = 30\frac{km}{s}\cdot25200 \ s\\\\\underline{s = 756 \ 000 \ km}[/tex]
[tex]c)\\dla \ \ t = 2 \ tygodnie = 14\cdot24 \ h = 14\cdot24\cdot3600 \ s = 1 \ 209 \ 600 \ s\\\\s = v\cdot t\\\\s = 30\frac{km}{s}\cdot1209600 \ s\\\\\underline{s = 36 \ 288 \ 000 \ km}[/tex]