Afirst place finisher in a cross country meet ran 5,000 meters in 871.7 seconds. what was his average speed?

Answer : His average speed was, 5.735 m/s

Solution : Given,

Total distance covered = 5000 meter

Total time taken = 871.7 seconds

Average speed : It is defined as the total distance covered in total amount of time.

Formula used :

Now put all the given values in this formula, we get his average speed.

Therefore, his average speed was, 5.735 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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