What instrument is used routinely to check a person's exposure to radiation?

With i really need the correct answer!

Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?