Alarge convex lens stands on the floor. the lens is 180 cm tall, so the principal axis is 90 cm above the floor. a student holds a flashlight 120 cm off the ground, shining straight ahead (parallel to the floor) and passing through the lens. the light is bent and intersects the principal axis 60 cm behind the lens. then the student moves the flashlight 30 cm higher (now 150 cm off the ground), also shining straight ahead through the lens. how far away from the lens will the light intersect the principal axis now? a. 30 cm b. 60 cm c. 75 cm d. 90 cm

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.