Moderate-intensity physical activity, such as brisk walking, requires percent of one's aerobic capacity. 40-49 50-59 60-69 70-79

Causes of film fogging are a. secondary or scattered radiation exposure and outdated film. b. exposure of film to light during processing and solution splashed on the film before processing. c. movement of the patient and weak developing solution. d. incorrect placement of film and processing that's too long.