Explain the law of machines?
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Why does a heavy stone nor break a glass place when place slowly on it, while a small stone falling from a great height easily breaks it ?
Define Umbra?
What is Absolute humidity ?
Explain the Reflection ?
Why it becomes bitterly cold as soon as the snow starts melting?
At what temperature does the filament of electric bulb glows ?
How can you conform that magnetic lines come from a single bar magnet with out any external instruments?
Why is it easier to lift a stone in water than in air ?
Why us steel more elastic than rubber ?
What is the normal pulse beat of a human body?
When we press our hand on a table downwards, why we do feel the table pressing id greater.
Why ate the telegraph wires kept a little loose ?