Explain real and virtual image?
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Why ate the air passengers requested to see that their fountains pen Are not completely filled ?
Explain what does hull speed mean?
the hardest substance available on earth
Explain about Magnetic mines
Describe the main process involved in the manufacture sugar. What is the main bi-product of sugar industry and to what use as put in Bihar ?
Explain what affect does electricity have on soil?
Why does ink not spread n the paper used in the ?slick? ?
What is a Coal ?
Why current is denot with I ?
Why are the steam pipes and hot water pipes used for heating rooms, not fixed to the walls firmly at both ends ?
Define Fixation of Nitrogen?
how sunlight produce e.m wave in vacuum?