Explain the difference between a lens and a mirror?
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Define weight?
Why a small stone and a big stone reach at the same time when they are made to fall through the same heights ?
What is Sextent ?
Describe the Infra-red and Ultra-voilet rays?
How is nuclear fission different from nuclear fusion?
what is Gauge?
Explain the Real and Virtual Image ?
On breaking a magnet, how many poles will be got ?
What is the second law of thermodynamics?
Explain why is there more friction when you push an object than when you pull it?
How can you save the sea from oil and sound polution?
Swimmers are provided with an inflated rubber jacket . why?