A revolving satellite is similar to a lift which is falling from a height. Only the difference is that the satellite has a very high horizontal velocity due to which the satellite moves forward while falling to earth. And when the earth's curvature and the lift's downfall match, the satellite keeps revolving. Like in a freely falling lift, a man inside the satellite does not feel the gravity and his apparent weight is zero. Now when we conduct an experiment in the satellite what equations/formulas do we use? How do the expermients in satellite compare with the same on the earth? For example, when we conduct experiments of surface tension (capillary tubes), what do we use in the formula for the parameter gravity - the gravity that is really working in the satellite or the apparent gravity i,e. zero?