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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.
Explain why easier to pull a lawn roller than to push it? Explaination : In Pulling, effective weight of lawn mover= mg-fsinx In pushing, effective weight = mg+
'Heavy water is often used as a moderator in thermal nuclear reactors.' Give reason.
(i) Lead balls are spherical in shape. (ii) Rain leaves and a globule of mercury placed on glass plate are spherical. (iii) Hair of shaving painting brush, when goes in wate
calculate the magnifying power of a simple microscope whose focal length is 6 cm and the distance of distinct vision of 25 cm
Energy Transformation for a Dart In that case of the dart being launched from the spring gun and the just forces doing work upon the dart are internal forces. Initially, the da
It uses in electric cooling devices, turbines ...........etc
Magnetic effect of the earth is? Magnetic effect of the earth. The earth behaves as it has got a big magnet, running as mot a big magnet, running almost from its north to South
what is physics and how to learn it easlly?
properties of low and high resistive materials
Q. Why does the sky appear blue in colour? As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look o
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