# Simple Barometers & Air Pressure

by belyzel4
Tags: barometers, pressure, simple
 P: 13 no,of course not,but for other reason... pressure is the same,1 atm,doesnt matter the diameter of tube,but the mercury will fall due to his own weight,so it wouldnt rise at760 mm... thats why such tubes have tiny diameter,for the weight not to count... this pressure is made by gravity of the air,so gravity its the same,doesn`t matter the mass of the object,they are attracted with the same g to the earth... if you understand this,you understand the pressure problem as well...