This is not easy. We don't know what CS, US, CR, or UR is, and we don't know the end result. Basically, we have no clue. This question has to get pitched into the "No given information" bucket.
Focuses light on the retina
A vacuum tube consists of cathode (also called as filament), anode (also called as plate), and electrode (also called as grid). Cathode is an electron emitter that emits the free electrons whereas anode is an electron collector that collects the free electrons.
I hope this helps.
The moon phase shows that D. light reflected during the first quarter and third quarter moon phases appears equal because the sun, moon and Earth are at right angles.
<h3>What is a moon phase?</h3>
It should be noted that the <em>moon</em> phase simply means the portion of the moon that we can see from the Earth.
In this case, the light reflected during the first quarter and third quarter moon phases appears equal because the sun, moon and Earth are at right angles.
Learn more about moon on:
brainly.com/question/398659
Potential Energy is a type of energy that is "possessed" by a body of its position, electrical charge, etc.