Question

Temperature
() Upper fixed point
(iv) Lower fixed point
(v) Fundamental range (interval) of a
b) Describe an experiment to determine the;
(i) Upper fixed
(u) Lower fixed point of a thermometer.
:) A thermometer mercury thread is 5mm at
ibstance in which the mercury thread is 45
:) cm(1)A Mercury thread is 30 at 90 °C. Fi​

Answer 1

hope it helps in somd way

1. 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.
2. The lower fixed point, or ice point, is the temperature of pure melting ice at normal atmospheric pressure. The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure.
3. The value arbitrarily assigned to the difference in temperature between two fixed points (such as the ice point and steam point) on a temperature scale, in order to define the scale.