A dot whistle is designed to provide a sound with a frequency beyond which can be heard by humans. If a particular whistle produces a sound with a frequency of 25000 hz, what is the sounds wavelength? Assume the speed of sound in the air is 332 m/s.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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