A heavy box sits on a floor. The net force on the box can be represented as which of the following? A -zero vector pointing up
B. Non-zero vector pointing down
C. Non- zero vector pointing left
D. Non- zero vector pointing right
E. It is zero

im not to sure what it is

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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