When the boat is placed on the scale, how does its weight compare to the weight of the water it displaced?

It'll be lighter than when it is put on the water.

Explanation: Cause when a boat needs to move, it usually takes water into the engine, and then propulses it bk out.

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 c

tell me if wrong