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Q. What are polar molecules? Give an example.
i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the negative charges by a finite distance.
ii) Instance: N2O, H2O, HCl, NH3.
iii) They have an eternal dipole moment.
A uniform spring of length 2m and mass 200gm is under a tension of 800N. Find the speed of transverse wave in the string.
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What would happen if the principle of relativity is proved wrong?
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Q. What is dual character of light? Light behaves as particles of energy in the higher energy region as well as as waves in the lower energy region.
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