In 2004, a NASA spacecraft named Stardust flew within 147 miles of Comet Wild 2 (pronounced Vilt
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In 2004, a NASA spacecraft named Stardust flew within 147 miles of Comet Wild 2 (pronounced "Vilt 2"), zooming by it at 6200 m/s, about six times the speed of a rifle bullet. Photos taken by Stardust show that the comet is roughly spherical, as shown in FIGURE 12-40, with a radius of 2.7 km. It has also been determined that the acceleration due to gravity on the surface of Wild 2 is 0.00010g. What is the minimum speed needed for an object to escape from the surface of Wild 2?
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