Question

The weight machine measures appearent or real weight?

Answer 1

See below.

Explanation:

Only the mass is an invariant value; weight depends above all from gravity acceleration, but also from the archimedean force, that is the force given by a fluid (hence also by air) on whatever object that is in our atmosphere. This force depends by density of air according to `d= M/V=P xx (MM)/RT` where P is the pressure, MM is the average molecular mass of air (about `29 g/(mol)`) but depends also from umidity) `R` the universal constant of ideal gases, `T` the absolute Temperature.

I hope that helps!