Two hockey pucks with mass 0.1 kg slide across the ice and collide. before the collision, puck 1 is going 8 m/s to the east and puck 2 is going 7 m/s to the west. after the collision, puck 1 is going 7 m/s to the west. what is the velocity of puck 2? a. 7 m/s east b. 8 m/s west c. 8 m/s east d. 7 m/s west

C. 8 m/s east

is your answer.

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 order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force