Explain heat treatment. Why and how is it done?
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Which property of sound is affected by change in air temperature?
Explain refraction?
Explain about Gases ?
Why are the days and nights equal at the Equator throughout the year?.
What is a Coal ?
What would happen if a disk one light second in circumference were to spin at 60 rpm?
Will a dc motor actually produce voltage if it is spun in reverse?
Explain about Magnetic mines
What happens to the velocity of sound with the rise of temperature?
WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
How can it be proved that the strength of the North and South poles of the magnet is same ?
On an electric schematic, what does the symbol of a horizontal line interrupted by a saw tooth shaped line represent?