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.
== Time difference between Sydney, Australia and New York, USA is16 hrs Sydney id 16 hrs ahead of NYC (calendar time difference), so when it is 6 am (morning) in NYC, it is 10 pm (night) in Sydney == I called Sydney Australia at 5:27 PM EDT, and my friend in Sydney answered that it was 7:27AM.