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Narrowing Stream

Turn on the tap. The water starts flowing out. At the top the stream of water is the size of the tap opening but it grows smaller as it falls.
What's the reason?

Surface tension tends to hold the water in a solid stream at the top but as it falls its speed increases because of the pull of gravity. Since it is a continuous flow the amount passing any point must be the same. The amount of flow is the cross sectional area of the stream multiplied by the speed of flow of the water. So as the water is flowing faster as it falls, the stream narrows.

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Dimdima is the Sanskrit word for ‘drumbeat’. In olden days, victory in battle was heralded by the beat of drums or any important news to be conveyed to the people used to be accompanied with drumbeats.

Dimdima.com

Bharatiya Vidya Bhavan
K. M Munshi Marg,
Chowpatty, Mumbai - 400 007
email : editor@dimdima.com

Dimdima Magazine

Bharatiya Vidya Bhavan
505, Sane Guruji Marg,
Tardeo, Mumbai - 400 034
email : promo@dimdima.com

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Dimdima.com, the Children's Website of Bharatiya Vidya Bhavan launched in 2000 and came out with a Printed version of Dimdima Magazine in 2004. At present the Printed Version have more than 35,000 subscribers from India and Abroad.

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