PATH and the Hudson line light rail.
Subway
Take the PATH train.
New Jersey has its own train into Manhattan, called the PATH train, which connects to the Eighth Avenue subway line (the A-C-E, or the blue line). So, no, there are no plans to extend the MTA (Metro Transit Authority) subways into New Jersey.
No. Newark is in New Jersey. All of the trains that go from New York to New Jersey terminate in Manhattan. You can use the subway to get from Brooklyn to New York and then take a train to Newark, NJ.
It depends on where you live. If you live close enough to the state of New Jersey, then the best and cheapest way to get there is by car, train, or subway.
Where in Brooklyn? Where in New Jersey. 1) Take the subway to the Port Authority Bus Terminal at 8th avenue and 42nd Street in Manhattan. This will cost you $2.00. From there take a NJ transit bus to New Jersey. Cost depends on where you are going. 2) Take the subway to the PATH station in Manhattan. Path stations are at 33rd, 23rd, 14th street, 9th Street, and Christopher St. Then take the PATH train to New Jersey.
New York City Subway, or just the subway, or MTA.
I assume you are asking if the subway tunnels go under rivers or oceans. The answer is yes. For example, the NYC subway goes to Brooklyn and Queens, which is on the opposite site of the East river from Manhattan.
According to the New York City Parks Department's official website (see the Related Link below), there is no park called Meadowland Park in Queens. Google searches also turn up nothing. Perhaps you meant the New Jersey Meadowlands, aka the Hackensack Meadowlands, a region of wetlands in northeast New Jersey? Or the Meadowlands Sports Complex, also in New Jersey? If so, then, the New York City subway system does not run to New Jersey.
Why are new entrepreneurs essential for Subway to meet its aim of expansion? Why are new entrepreneurs essential for Subway to meet its aim of expansion?
Because that's how we roll in Jersey! 2014 at New Meadowlands Stadium!! Come on subway series!
Subway, eat fresh :P