is that brittle is inflexible, liable to break or snap easily under stress or pressure while flexible is capable of being flexed or bent without breaking; able to be turned, bowed, or twisted, without breaking; pliable; not stiff or brittle.s that brittle is (uncountable) a confection of caramelized sugar and nuts while flexible is (chiefly|engineering|and|manufacturing) something that is flexible. As adjectives the difference between brittle and flexible. As nouns the difference between brittle and flexible.
If you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to Charles's law. In this case, volume will also decrease. If you were to maintain a constant volume while decreasing the temperature, the pressure would also have to decrease in order to satisfy Gay-Lussac's law.
It is only an equilibrium if both liquid and vapour are present. The saturated vapour pressure of the liquid will force the mercury level down a bit. You can measure the drop-and this gives a value for the saturated vapour pressure of the liquid at this temperature. liquid boils when its saturated vapour pressure becomes equal to the external pressure on the liquid. When that happens, it enables bubbles of vapour to form throughout the liquid-those are the bubbles you see when a liquid boils.