Which of the following is NOT a vector quantity? A a frictional force of 50 N against the tires

B an unstable star with a temperature of 100 B Kelvin

C a truck going up the hill at 40 mph

D a skydiver accelerating 9.8 m/s2 downward

C a truck going up the hill at 40 mph

i will answer your question if you answer mine

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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