A space station was established far from the gravitational field of Earth. Extended stays in zero gravity are not healthy for
human beings. Thus, for the comfort of the astronauts, the
station is rotated so that the astronauts feel there is an internal
gravity. The rotation speed is such that the apparent
acceleration of gravity is 9.8 m/s2. The direction of rotation is
counter-clockwise. If the radius of the station is 80 m. What is
its rotational speed, v?

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?