Three odd-shaped blocks of chocolate have the following masses and center-of-mass coordinates: (1) 0.300kg , (0.200m , 0.400m ); (2) 0.400kg , (0.200m , -0.400m ); (3) 0.200kg , (-0.300m , 0.700m ).

(a)Find the x-coordinate of the center of mass of the system of three chocolate blocks.
(b)Find the y-coordinate of the center of mass of the system of three chocolate blocks.

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.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;