A rotating cylinder about 16 km long and 7.8km in diameter is designed to be used as a space colony.

With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?

0.05 rad/s

Explanation:

7.8 km = 7800 m

For the residents inside the space cylinder to experience the same gravitation acceleration g = 9.81m/s2 on Earth, the centripetal acceleration must be the same as g

But centripetal acceleration is product of angular velocity squared and radius of rotation r

a.   mass number from atomic number