Aboy weighs 40 kilograms. he runs at a velocity of 4 meters per second north. which is his momentum?

the rearrangement of particles in a physical change. hope this

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.