1. Pressure is defined as force per unit area that a fluid exerts on its surroundings.[1] For example, pressure, P, is a function of force, F, and area, A. P = F/A. A container full of gas contains innumerable atoms and molecules that are constantly bouncing of its walls.
Length of the day in Sydney is 10:03 hours. Civil twilight begins at 06:32:04 and ends at 17:29:15 hours. Nautical twilight in Sydney begins at 06:01:11 and ends at 18:00:08 hours. Astronomical twilight in Sydney begins at 05:30:58 and ends at 18:30:20 hours.
1 Muni runs 24 hours a day, every day of the year. 2  Most routes begin between 5 and 8 a.m. 3  Most routes end between 11 p.m. and 1 a.m. 4  Some routes only run weekdays, daytime or during peak ârushâ hours.  A reduced âOwlâ service network runs between 1 and 5 a.m. nightly.