Which statement correctly describes the gravitational potential energy of the pendulum based on this diagram?
a.
it is greatest at 25% of the period length.
b.
it is greatest at the point where the arm meets the pivot point.
c.
it is greatest when the bob is at its maximum amplitude.
d.
it is greatest when the bob is in the rest position.

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!