A cart loaded with bricks has a total mass of 12.7 kg and is pulled at constant speed by
a rope. The rope is inclined at 22.5◦
above the horizontal and the cart moves 30.7 m on
a horizontal floor. The coefficient of kinetic
friction between ground and cart is 0.7
The acceleration of gravity is 9.8 m/s
2-How much work is done on the cart by the
rope?

the question is missing info

area of focus

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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