The speed needed to escape the pull of earth's gravity is 11. 3 km/s. What is this speed in mi/h?.

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

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At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.