What is loudness of sound?
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Explain what is the rectilinear propagation of light?
Define Newton's third law of motion?
Which of the surfaces of a thermos flask are silvered and why?
what is big ban theory???????????????????????????????
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?
Why current is denot with I ?
Explain about Electron microscope?
Why can a bird fly, while a man cannot ?
what is mariners compass
What is sonar?
What is physical significance of wave function? : quantum physics
What is radium used for?