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This week's questions

After a few plays why does the quality of sound diminish in a cassette and how can it be restored?

Ashraf Ali, Chennai

Why is cold water sprinkled on the face of a person who has fainted?

N.Sivaraman, Chennai

How are clouds white in colour while the sky is blue in colour ?

Ramkumar, Chennai

Why does new footwear bite the feet?

K.S.Shiek Uduman, Chennai

How does a telephone work without electric supply?

Syed G.Shanawaz, Pondicherry

Why is it not possible to sleep with our eyelids open?

S.Vidhyalalitha, Vellore, T.N.

Readers are invited to send their queries with full postal address to `Farm Queries', The Hindu, Kasturi Buildings, 859/860, Anna Salai,Chennai 600002 or email to farmqueries@thehindu.co.in

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