What is sonar ( sound navigation and ranging )?
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the the domestic consumption of electricity is calculated in
What is the Electro magnet ?
Why is diamond cut to make if brilliant ?
Explain about Bessemer?
Why is there more friction when you push an object than when you pull it?
Explain refraction?
What do you know about the Fluorescent Tube?
Is the electric field constant or does it vary with time in dielectric materials?
What is the musical sound?
How do whales sink or rise at their own will ?
What is the smallest size of plane mirror in which a man can see his fill image length ?
Explain the difference between emission and absorption line spectra. : quantum physics