Ball A is 3 kg and moving 12 m/s and collides with Ball B that is stationary. After the collision, Ball A comes to a stop and Ball B
moves away at 9 m/s. What is the mass of Ball B?

an enlarged virtual image

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

this would be about 43%