Conservation law, also called law of conservation, in physics, several principles that state that certain physical properties (i.e., measurable quantities) do not change in the course of time within an isolated physical system. In classical physics, laws of this type govern energy, momentum, angular momentum, mass, and electric charge.
On New Yearâs Eve, the Metrorail system will open at 7 a.m. with special extended service on all lines until 3 a.m. The additional three hours of service â consistent with past years â is a special exception to a moratorium on extended hours during the year-long SafeTrack maintenance program.
Opening Hours. From 1st january 2017 to 8th january 2017. OPEN from 10:30 am to 6:00 pm / 2nd january CLOSED. Last access: 5:10 pm. From 9th january 2017 to 11th february 2017 CLOSED. Click here for full detailed opening times.