1.How much kinetic energy does an apple with a mass of 0.25 Kg have if it is falling at a speed of 10m/s

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

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.