Wheels

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The Wheel

The Wheel

The wheel is perhaps man’s greatest invention. Simple as it seems, it is the very basis of movement. The cart, the cycle, the motor-car and the railway train move on wheels. Even aircraft which fly thousands of kilometres through the air need wheels for taking-off and landing. It is not only for transport that the wheel is vital. Machines that produce various goods for us, watches that tell us the time, generators that produce electricity, and many gadgets which have become essential in our day-to-day life cannot work without a wheel....

How Does the Steam Engine Work?

How Does the Steam Engine Work?

In 1804 the first steam-powered engine ran, carrying some iron in Wales, in Britain. But it was almost twenty five years later, in 1829, that George Stephenson, a British engineer, designed the “rocket” that paved the way for railways all over Europe, Asia and America. How Does the Steam Engine Work? [Illustration by Shiju George] The steam engine is an example of a heat engine. Heat engines are those that convert heat energy into mechanical work....

What is the Secret of the Windmill?

What is the Secret of the Windmill?

It was a particularly windy day in late July when my cousin and I sat down to make a pinwheel. The paper was folded into a wheel, the pin inserted at the heart of it and the entire structure fixed to the broomstick. As our pinwheel took shape we ran out braving the sun and the hot wind. The pinwheel caught the wind and rotated. Seeing it, our hearts pin-wheeled as well. Energy from wind...

Your Own Bus

Your Own Bus

Shiny vehicles on a shop shelf are inviting, but how about making a shiny red bus, much like the ones you see on the roads. What’s more, you can give a new life to things that are being readied for the dustbin at this very instant! The things you need: Empty juice carton Felt paper (any colour of your choice) Black marker pen or pen Four bottle caps Glue Thermacol Your Own Bus [Illustrations by Anup Singh] Step 1: Paint the four bottle caps to make the wheels for your bus....

Making Light of Darkness

Making Light of Darkness

May 11: Till five years ago, the Male Kudi tribals of Kodyadi, in the Western Ghats in Mangalore, lived in darkness. The government had never switched on to their needs. But now, thanks to their leader, Elyanna, the first graduate in the tribe, they have invented an ingenious method of electrifying their village – and their achievement has electrified the nation. In 1995, when Elyanna returned from his educational stint at Ujire, his mind was teeming with ideas....

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