Answer:
Controlled fission chain reactions can be used to produce electricity in a nuclear-powered submarine.
4.Medical imaging devices use radioactive elements with short half-lives to see through the human body and diagnose patients
Step-by-step explanation:
A submarine uses nuclear vision as a source of energy. The heat from controlled nuclear fission reactions produces steam which drives a steam turbine to power the submarine.
In the area of medicine, medical imaging is becoming a popular technique for diagnosis of many illnesses. These radioactive elements with short half lives are used to see through the human body for the purpose of diagnosis.