[填空题]
A projected space station consists of )hy a5.hl vvx8a circular tube that ai2 b+emk2t0o 0w9 plfwill rotate about its center (like a tubular bicycle tire) (Fig. 5–42). The circle formed by the tube has a p 02m9aw2lb k+o0f etidiameter of about 1.1 km. What must be the rotation speed (revolutions per day) if an effect equal to gravity at the surface of the Earth (1.0 g) is to be felt?$\approx$ $\times 10^3$
