Why mercury rises in a barometer ?
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What is the effect of using two converging lenses in one optical instrument?
Why is diamond cut to make if brilliant ?
What is the shadows?
Which is heavier the land mass or the sea?
why ship doesnt sink sea
What is the force needed to accelerate a mass of one kilogram one meter per second per second?
What is the smallest size of plane mirror in which a man can see his fill image length ?
Explain the difference between isolation transformers and step up or step down transformer?
What is Metals ?
Tell me what is radium used for?
Explain the Mortar ?
What is different between secondary electron image and back scattered electron image?