Why do we use a perforated plate at the bottom of a pressure cooker?
V. Srinivas Jayapala, Hyderabad
Why is there a humming noise when UPS runs on battery but not during the normal operation?
R.Saranyaraj, Coimbatore, Tamil Nadu
Why are LCD or plasma displays always rectangular in shape?
Ramon Varghese, Pathanamthitta, Kerala
Why don’t we find pigeons on trees?
Ghulam Mehdi Harkari, Kargil, Ladakh
Normally welders feel pain and irritation in the eyes at the end of the day? What causes this?
S.Selva Kumar, Pondicherry
Why does the taste of tea or coffee kept in a thermos flask change when consumed after a few hours?
V.G. Sathyanarayana, Chennai
Is it possible to replace human eyes with cat’s eyes to get day-night vision?
Laxman Phadtare, Thane, Maharashtra
How does depression bring heavy rain?
K. Anaantha Narayanan, Kanyakumari, Tamil Nadu
Is it not possible to generate electricity from wind in a train which is moving at its average speed for a long duration?
N. Arumugam, Tirunelveli, Tamil Nadu