A class is 47 min how many seconds is this ?

2820 seconds

1 minute = 60 seconds

Multiply the value times 60

47×60=2820

take a better picture and ill do it

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.