no
yes
Gravity, same as any other train.
No, you must have the same gauge track as your train is made in.
There is no practical limit to the length of train track. Individual rail sections are welded together to make a continuous track. The longest distance you could currently go on the same train without that train having to leave the tracks would be from Kaliningrad on the Baltic Sea to Vladivostok on the Pacific Ocean.
No. There are many different scales, or gauges, of model trains. For example, an N scale train would be too small to fit on HO scale track.
There are three main circuits that a railroad crossing uses. There's the two approach circuits on either side, and the island circuit which is the actual crossing itself. Some signal circuits are equipped with timers that will make sure the train has absolutely stopped in the approach circuit and not the island circuit, and time out the signals. Crossing gates work by a simple relay block in the relay case (where the electrical components are.) that have a timer in them and send a signal for the gate mechanism to bring the gates down and close the road. When the train has left the island circuit and cleared the approach block it came from, the gates will rise and the road will reopen. Crossing bells work the same way with a signal being sent to them. * Added - The track circuits that activate the crossing systems when a train approaches do not rely on the train "completing" a circuit, as this type of circuit is illegal in the US and many countries. The train either "shunts" the circuit or in the case of electronic circuits, the electronics sense the train, which can include sensing its speed.
They are used so that the railway track doesn't compress or move, and stay's the same so the train doesn't squash the track.
one train enters the tunnel at 7am the other at 7pm
The three types of maglev trains are EDS (electrodynamic suspension), EMS (electromagnetic suspension) and stabilized permanent magnet suspension (SPM). * For EMS, same pole electromagnets in the train repel it away from a magnetically conductive track. * The EDS uses electromagnets on both the track and the train, to push the train away from the track. * SPM uses opposite arrays of permanent magnets to magnetically levitate the train above the track. http://trains.suite101.com/article.cfm/maglev_trains
If you have two magnets they each have a north and south pole. The opposite poles will attract and the same poles will repel. Maglev trains create magnet fields on the track bed and the train of the same polarity. By controlling the generating of the fields you can hold up the train and propel it forward. Since the train is not actually touching a track there is no appreciable friction except that caused by the surrounding air. In a vacuum you would have no friction.
Yes, it is located in Ohio. The curve is only used about once a day in each direction by the same train of the Wheeling & Lake Erie Railroad.
The three types of maglev trains are EDS (electrodynamic suspension), EMS (electromagnetic suspension) and stabilized permanent magnet suspension (SPM). * For EMS, same pole electromagnets in the train repel it away from a magnetically conductive track. * The EDS uses electromagnets on both the track and the train, to push the train away from the track. * SPM uses opposite arrays of permanent magnets to magnetically levitate the train above the track. http://trains.suite101.com/article.cfm/maglev_trains