A valuable antique chest which weighs 1400 N is to be moved into a truck. To get the chest from the ground onto the truck bed, which is 1.0 m higher, the movers push it up a rough ramp 4.0 m in length.
The coefficient of kinetic friction between the chest and the ramp is 0.20. Calculate the work done by the
movers on the chest if they push it at constant speed with a force, F, at an angle of B = 30° above the
(75)
horizontal​

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

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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