A bullet of mass 15 g moves horizontally at velocity of 250 m s^ -1 . It strikes a mass wooden block of mass 400 g placed at rest on a floor. After striking the block, the bullet is embedded in the block. The block then moves through 15 m and stops. Calculate the coefficient of kinetic friction between the block and the floor.

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation:

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.