A 15 kg aluminum box is sliding down a steel surface that is inclined at a 33- degree angle above the hprizontal. (coefficient of friction = .47 ) What is
Fg?

i would think klcio3

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.