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They are put on the ground with equal distance and then trains can ride on them instead of on the ground...

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What is the movement called when people and goods are from one place to another?

The movement of people and goods from one place to another is called transportation. It involves the physical transfer of people and objects using various modes such as roads, railways, airways, or waterways.


Where was the standard gauge invented?

The standard gauge for railway tracks was developed in England during the early 19th century, primarily by George Stephenson. This gauge of 4 feet 8.5 inches became the most widely used standard for railways around the world.


What are the types of mechanical work?

The types of mechanical work include static work, dynamic work, and intensive work. Static work refers to work done without motion, dynamic work involves movement, and intensive work focuses on the internal energy changes within a system.


How does input work and out put work affect the efficiency of a simple machine?

Input work is the work done on a machine, while output work is the work done by the machine. Efficiency of a simple machine is calculated as the ratio of output work to input work. The efficiency of a simple machine is high when the output work is close to the input work, indicating that the machine is converting most of the input work into useful output work.


What are the uses of thermal expansion?

Thermal expansion is used in various applications, such as in the design of bridges and railways to account for temperature changes. It is also utilized in devices like thermostats and bimetallic strips to control temperature. In materials science, thermal expansion is important for determining the dimensional stability of materials over a range of temperatures.