nebnex
billy
 
 
未提供信息。
当前在线
最喜爱的游戏
13.8
已游戏的小时数
will 2023 年 8 月 22 日 上午 10:35 
change back now
bdon 2023 年 8 月 22 日 上午 4:54 
♥♥♥♥♥♥♥ FURRY
Imaginashun 2021 年 9 月 17 日 下午 11:10 
(>^^)>
will 2021 年 9 月 17 日 下午 11:09 
-rep wont eat raw fish with us
a letter 2021 年 3 月 3 日 下午 7:28 
Satellites can be put into elliptical orbits if they need only sometimes to be in high- or low-earth orbit, thus avoiding the need for propulsion and navigation in low-earth orbit and the expense of launching into high-earth orbit. Suppose a satellite is in an elliptical orbit, with a = 4426 and b = 4416 (a and b in the standard formula for an ellipse), and with the center of the Earth being at one of the foci of the ellipse. Assuming the Earth has a radius of about 3960 miles, find the lowest altitude of the satellite above the Earth when it's on the major axis of the elliptical orbit.