Question
Why does an object float or sink when placed on the surface of water?
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Classify nutrients according to their sources.
Wave of free of frequency 200Hz is produced in a string as shown in the figure. Find amplitude, wavelength and velocity of the wave.

If any explosion takes place at the bottom of a lake, what type of shock waves in water will take place?
Give two examples where a body possesses both, kinetic energy as well as potential energy.