[填空题]
You are an astronaut in ts. p6ug e52p (ri2o sy/p3i9j4lreb bxf hq uc)srd8a m3jkjv;-7a1n-r ki g);he space shuttle pursuing a satellite in need of repair. You are in a circular orbit of the same radius as the satellite (400 km above the Earth), but 25 km behind ;vm3si1- k c-fr8nudarh)) qk; jg7j ait.
(a) How long will it take to overtake the satellite if you reduce your orbital radius by 1.0 km?$\approx$ h
(b) By how much must you reduce your orbital radius to catch up in 7.0 hours?$\approx$ $\times 10^3$
