Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. another scientist conducted the same experiment and got similar results. which concept does this best illustrate?

The concept of repetition is best illustrated in the given question.

Explanation:

Let us consider that a  scientist named A conducted an experiment in his or her laboratory. He discovered a new fertilizer, and when the small amount of that when added to the plant it grows very briskly. Similarly, when an another scientist named B performed the similar experiment in the lab and obtained identical outcomes, which means that scientist B is repeating the same experiment that was done by the scientists A. Thus, it explains the concept of repetition.

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.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.