Why metallic tools used by blacksmiths have wooden handles ?
What is a cell?
Why does water boil above 100 o C in mines ?
While standing on railway platform and heating the whistle of an engine coming towards us , we hear the sound increasing; bit when the engine is receding from us it appears to fall why ?
How can the iron sheets be prevented from rusting ?
When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?
Explain the how to make Alloys?
How does the viscosity vary with temperature?
How many millilitre is equal to 1 litre and how many microliter is equal to litre?
Explain the Element?
What is the octane number range of te petrol used in India ? 1)90-95 2)90-99 3)80-90
What is molality?
What is the reaction that occurs between iodine and sodium thiosulphate?