A spy satellite designed to peer closely at ABD a building o

A spy satellite designed to peer closely at ABD (a building on Earth) every day at noon has a 24-hr period,
and a perigee of 100 km altitude directly above ABD. What is the altitude of the satellite at apogee?

Solution

Time =24hr=86400sec. Mass of earth= 5.98×10²⁴kg. Radius of earth= 6.37×10⁶m. G= 6.67×10^{_11. H=! , t square/r cube=4 square/G.mass,earth. R cube= T square ×G×mass of earth/4square. Rcube= 86400×86400×6.6×5.98×10\'24/4square. Rcube=7.54×10\'22meter cube. R=4.23×10\'7 m. Earth surface is 6.37×10\'6m. So height= radius-earth surface. H= 3.59×10\'7m.}