本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 国际高中通用物理
[单选题]
A satellite is in a low wtc ;35gk cn;o6m8.xyrq.hvc. pke r, s ;ok6t8y qo+rbl:k *ccircular orbit about the Earth (i.e., it just skims the surface of the Earth). What is the speed ofrlsky+;*o86to: bq kc the satellite? (The mean radius of the Earth is $6.38 \times 10^{6} \; m$.)
A. 5.9 km/s
B. 6.9 km/s
C. 7.9 km/s
D. 8.9 km/s
参考答案: C
本题详细解析:
暂无
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