Aha! Activities by Arvind Gupta PDF

By Arvind Gupta

ISBN-10: 818717188X

ISBN-13: 9788187171881

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Example text

Then remove it to see a wonderful soap film pattern. 34 18. To produce a perfect soap bubble. LARGE SOAP FILMS Adding glycerine to the soap solution makes the film more elastic. The films last longer and look shiny. 1. Take two long straws and string. Thread 90-cm of string through two plastic straws. Knot the strings. 2. Make holes with needles on the ends of the straws and attach the threads as shown. 3. To make long lasting films add a few spoons of glycerine to the soap solution. Drop the straw-thread frame into the soap solution.

Fabre's life and his monumental work - which runs into more than 2500 pages, would always remain a source of great inspiration to every inquisitive child and adult the world over, more so in a country like India. Fabre's simplicity, his innate humility, his ability to be able to improvise experiments with almost zero-cost equipment holds a great message for everyone in this resource starved country. Fabre did so much with so little. His message is loud and clear - you do not need expensive apparatus to be able to do science experiments.

Here a square of shoe sole rubber has been into four pieces. All the pieces are hinged together with small strips of cloth and stuck with a rubber adhesive like Fevibond. This arrangement could be easily turned around either to make an equilateral triangle or a square. It is said that the great British puzzler- Dudney had a table like this. If he had 2 guests (he was the third) he would have the configuration of a triangle. With 3 guests he would just turn around the table to make it a square so that 4 people could sit around.

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Aha! Activities by Arvind Gupta


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