Agarage door opener has a power rating of 350 watts. if the door is in operation for 30 seconds, how many joules of energy are used? (hint: remember that 1 watt = 1 joule/sec)

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.