The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum.
The space above the mercury may be filled with nitrogen or it may be at less than atmospheric pressure, a partial vacuum.
The space above the mercury may be filled with nitrogen or it may be at less than atmospheric pressure, a partial vacuum.
تبسيط: The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum. خرج: