[填空题]
Calculate the centripetal accelerai2lo0/ r588*,ooubwvwgoo0 oyu4 iy ution of the Eaf wsuj+;lal.)*v ,+ )muf gqhprth in its orbit around the Sun, and the net force exerted om*+;ls,jv u)wgpfq+l)u af. hn the Earth. What exerts this force on the Earth? Assume that the Earth's orbit is a circle of radius 1.50$ \times 10^{11} \mathrm{~m}$ . [Hint: see the Tables inside the front cover of this book.] $\times10^{22}$
