An object is seen to fall from aeroplane and observed to take 15 seconds to reach the ground. Assuming that air resistance is negligible. Calculate
(1) The height of the plane from the ground
(2) The velocity with which the object strikes the ground.

battery with hi vtge high val resist in series

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!

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y