A ball is thrown vertically upward from the ground with velocity of 30m/s¹. Exactly 0.5s later another ball Is dropped from rest from a cliff 40m above the point from which the first stone was projected. find : a) The time after the first stone was thrown when the two stones meet
b) How far above the ground they are at the same time?

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.

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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