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Or did you mean: grams | ure gravity | 145 grams to yards | chicken leg quarter estimate protein grams | Pure gravity | 25 grams cheese calories | The radii of two planets are respectively R1 and R2 and their densities are respectively ρ1 and ρ2. The ratio of the accelerations due to gravity at their surfaces is {g_1}:{g_2} = frac{{{rho _1}}}{{R_1^2}}:frac{{{rho _2}}}{{R_2^2}} {g_1}:{g_2} = {R | Future space stations will create an artificial gravity by rotating. Consider a cylindrical space station 250 m diameter rotating about its central axis. Astronauts walk on the inside surface of the space station. What rotation period will provide "normal