What is sonar?
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Explain the Sound ?
In beta minus emission, the number of nucleons in the atom?
Why is the earth not used as a return wire in a telephone system, while it is dine so in case of telegraph system.
is it possible that the clock works differently in winter and in summer ?
If a plane is in the air and there is a fly flying inside the plane does the plane get heavier when the fly lands?
What is the second law of thermodynamics?
When a water pump falls to draw water, a bucket of water poured into it sets it working. Why ?
In the 19th century, this scottish scientist showed that all magnetic and all electric phenomena could be described by four equations that often bear his name. What ishis name?
What is the role of a transformer in a rectifier?
i didnot recieve my group1 hallticket
why is a coin in a vessel not vissible when seen fromjust below the edge of the vessel but can be viewed from the same position when water is poured into the vessel ?
Explain about Barometer?