Question

what do you mean by upper fixed point​

Answer 1

Answer:

The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure. Note that the fixed points are defined using common physical phenomena so that they can be easily reproduced.

Explanation:

hope this will help

Answer 2

Answer:

The upper fixed point ,or steam point is the temperature of pure Boiling water at normal atmospheric pressure...