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This week's questions

How is it possible to light a candle that is just put off, by taking a flame near its wick?

P. Keerthi Kumar, Chennai

Why does washing our face make us feel fresh?

A. Jesuraj, Tiruchi, Tamil Nadu

Why is the engine of a diesel locomotive kept running even while it is idling?

Manoj Singh, Bariatu, Ranchi

Is it true that some fruits cause cold if eaten?

Sirajudeen, Chennai

Readers can send questions/answers on science and technology for the Question Corner along with their names and address to the following email id: questioncorner@thehindu.co.in or to The Editor,

The Hindu (Science and Technology), 859-860, Anna Salai, Chennai 600 002.

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