A ball having a mass of 0.500 kg is thrown at a speed of 20 m/s. Determine the magnitude of its momentum.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

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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i believe the answer is electric potential.

explanation:

snell's law

refractve index = sin incidence / sin refraction