Why can’t the flames from the chimneys of petroleum refineries not be utilized for anything?

Dhivya R., Chennai

Why do black spots appear on cloth when it is kept wet for many days?Akshay Pola, Bidar, KarnatakaWhy do eyes water when we have cold?

Krishna Priyanka, Visakhapatnam, Andhra Pradesh

Andhra Pradesh

How does a radio transistor receive the radio waves?

D.stalinbarath, Tiruchirapalli, Tamil NaduWhat happens to the minerals and vitamins of milk when we prepare tea? Dothey remain unchanged?Manish Kumar, New Delhi

Why do we feel sleepy during boring classes?

Sharan M., Puducherry

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