Which factor is most important to keep the same when comparing the hardness of solids?
O A. The temperature of the hot plate
B. The method of making a scratch on the material
C. The intensity of the light
O D. The amount of each substance

truck y has a greater velocity than truck x.

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!

answer is slate

hope this