Pierre Curie did an experiment and strapped a tube of radium to his arm for a long period of time. When lesions formed and it was discovered that radium could harm healthy tissue, they wondered if it might destroy diseased tissue. Radioactive sources were inserted into the body or strapped to the surface. This was named-

Radioactive therapy

Explanation:

Radioactive materials were believed to have medicinal properties like having antibacterial effect and ability to cure a wide range of ailment. Radioactive therapy was marketed with the idea that humans had a high tolerance level for the radioactivity. It was not until research showed that the tolerance level was very much lower than thought, and the lethal side effects of radioactivity understood, that radioactivity was seen as highly dangerous, and handled with extreme caution and precautions.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle