Question

Suppose a scientist was able to construct a barometer with a liqud being twice denser than mercury, then how high would the liquid raise at standard pressure

Answer 1

Barometer: A barometer is a pressure measuring apparatus.

Pressure in liquids is equals to the product of the density of that liquid, its height in that barometer and acceleration due to gravity.A standard mercury barometer to measure atmospheric pressure is a tube with one end sealed. The sealed end is close to zero pressure, while the other end is open to the atmosphere. The pressure difference between the two ends of the tube can maintain a column of fluid in the tube, with the height of the column being proportional to the pressure difference. If the closed end has negligible pressure, the height of the column is proportional to the atmospheric pressure being measured.