Aforce of 20. newtons to the left exerted on a cart for 10. seconds. for what period of time must a 50.-newton force to the right act to produce an impulse of equal magnitude on the cart?

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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