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50:43
Walt ole is constant, which would cause the greatest increase in kinetic energy of a moving object?
Mass and velty are each reduced by one half
Nass is reduced by one half, and velocity is doubled
Nassis dubted, and velocity is reduced by one half
Mass and velocity are each doubled.
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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.

if it's not useful, feel free to report for mistake in answer.

the answer is 0.42 is that is an option. this question provides no info