Por qué produce el retroceso cuando se dispara un arma de fuego

he made 11 calls in one day

if they have a finite resultant

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

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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