For Q30 (b) (calculate rotational speed of the space station):
I equated everything correctly (mg = mv^2/r), with the m's cancelling out and g = 9.8 (and radius = 275 m).
I wrote 16.3 m/s. I just realised I put into my calculator v = sqrt(9.8*27) (missing the 5 at the end)
Do you still get...