A portable television using a 12 volt, 3 Ah rechargeable battery can operate for a period of about 6 hours. What is the average
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<h2>Hello!</h2>
The answer is A. the principal energy level
<h2>Why?</h2>The principal energy level or principal quantum number n, tell us about the position of an determined electron in the energy levels relative to the greater average distance of an electron from the nucleus, the larger the value of n and the higher its energy.
The principal energy levels contains n sublevels, orbitals and
electrons.
For example, the number 1, has one orbital which is contained in a energy sublevel, its called s orbital, and it's just an orbital with 2 electrons.
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The particle moves with constant speed in a circular path, so its acceleration vector always points toward the circle's center.
At time , the acceleration vector has direction
such that
which indicates the particle is situated at a point on the lower left half of the circle, while at time the acceleration has direction
such that
which indicates the particle lies on the upper left half of the circle.
Notice that . That is, the measure of the major arc between the particle's positions at
and
is 270 degrees, which means that
is the time it takes for the particle to traverse 3/4 of the circular path, or 3/4 its period.
Recall that
where is the radius of the circle and
is the period. We have
and the magnitude of the particle's acceleration toward the center of the circle is
So we find that the path has a radius of
