Ultraviolet radiation from the sun is controlled by the ozone but if it infiltrates into the atmosphere it becomes a hazard. The uv reaches our eyes and darkens the retina and blurs vision. The fovea becomes insensitive and the cells dormant. This causes gradual blindness.
.012 J is going to be your answer
Answer:
Action and reaction are equal but act in opposite directions
Answer:
momentum=mass×velocity
momentum =400kg×20m/s=8000kg.m/s
