How does sound travel in solid materials? The transmission of sound can be illustrated by using a toy model consisting of an array of balls interconnected by springs. For real material the balls represent molecules and the springs represent the bonds between them. Sound passes through the model by...

Travel by train is the right choice to enjoy your family vacation. It’s a different and charming way of seeing the countryside. Back in the early part of the century, train travel was the most common way of seeing the country, but in our era of cars and airplanes not as many people ride the...

Train travel in India is the most popular mean of transport in the country. Train travel in India has progressed through the years in many ways. It is said that any trip to India is incomplete without experiencing train travel. Earlier on, there were a select few trains that took you across the country...