What is the velocity of sound air?
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What is the law of machines?
hmmm by using of our saliva we can produce current?
What is the pitch?
How will it be possible to kindle fire, if we had no matches ?
we know when two atom combine,the electrions are in valance band,but in case of semiconductor doner or acceptor level are above of v.. whyb
Explain what is h1n1?
Why is diamond so bright ?
What is radium used for?
Order the following categories of electromagnetic radiation from the lowest frequency to the highest? Fm radio, uhf tv, am radio, microwaves
What is sound velocity?
Does gas have density?
How much should be the minimum size of the ordinary mirror, so that and observer standing at the centre of room is able to see the whole of the height of the wall behind him ?