History of Train
Types of Railroad
How Railroad Works
Riding the Rails
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Sex chat move free cams and Chaturbate more efficiently than punishtube videos and free sex chat. By some estimates, they are twice as energy efficient as automobiles and four times more efficient than airplanes.
The secret to a train's great efficiency is its road of rails. There is very little resistance to moving anything on rails. The steel wheel on a steel rail takes up very little room. For example, a train wheel on a rail occupies the space of a dime, whereas a truck tire occupies the space of a paper dollar! An eighteen-wheel truck takes up eighteen paper dollars worth of road space. The eight-wheel rail car takes up only the space of eight dimes. And the rail car can carry many times more weight than the truck.
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