Ahydraulic jack has a ram of 30 cm diameter and a plunger of 4.5 cm diameter. find the weight lifted by the hydraulic jack when the force applied at the plunger is 50 kgf.

i wanna say it’s between b and d, leaning more towards b.

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.

hope this ! this is not copied! search it up, it's free of plagiarism!