What is the station's orbital speed? the radius of earth is 6.37*106m, its mass is 5.98*1024kg.

The formula to get the rational or orbital speed given the mass and the height of the object is:

ω² = 3g/h

where ω is the orbital speed, g is the acceleration due to gravity, and h is the height of the object

Substituting values:

ω² = 3 (9.81) / 6.37x10^6

ω = 2.15x10^-3/s