China Naming Network - Ziwei Dou Shu - Meteorological satellites located above the earth monitor the formation and development of weather systems in a certain area of the earth. As shown in the figure, when the satellite S is located on the surface of the earth,
Meteorological satellites located above the earth monitor the formation and development of weather systems in a certain area of the earth. As shown in the figure, when the satellite S is located on the surface of the earth,
Let the center of the circle where AB is located be point O and connect OB.
Let ∠ Bos = n, from the meaning of the question, we can know that SB is tangent to ⊙O,
∴SB⊥OB，
∫ 1730= 6400πn 180, that is, 1730 = 6400? 3. 14? n 180，
∴n≈ 15.5，
Therefore, in Rt△OBS, cos∠BOS= OB OS,
∴OS = ob cos 15.5 = 6400 cos 15.5≈6642
∴sa=so-ao=6642-6400=242≈2.4× 10 2。
A: The height of the satellite S from the earth's surface is about 2.4× 102 km.