試題詳解

(1)A satellite of mass 270 kg is placed into Earth orbit at a height of 1250 km above the surface. Assuming a circular orbit, how long does the satellite take to complete one orbit? (G = 6.67×10⁻¹¹ N-m²-kg⁻², Earth mass = 5.97×10²⁴ kg, Earth radius = 6.37×10⁶ m)
(A)5.919×10³ s
(B)6.623×10³ s
(C)5.278×10³ s
(D)7.392×10³ s
(E)8.019×10³ s