(4) With the exception of hoses used to extinguish fires, any hose connected to. a fire hydrant must be equipped with either an approved backflow prevention. device or an approved four (4) inch air gap, unless in the Department's opinion, the application does not pose a backflow hazard, such as watering a community.
What was most likely the cause of Marie Curie's leukemia? a. Radiation c. Pollution b. Smoking d. Genetics. a. Radiation was most likely the cause of Marie Curie's leukemia.
Madame Marie Curie is a scientific icon remembered for her pioneering work in the field of radiation research. She discovered Radium and Polonium, defining their atomic weight and their place in the periodic system, and she was the first to discover methods for extracting pure Radium salts and metal.