Question 38 (2 points) A student is concerned about background radiation that she is exposed to. She claims that nuclear power plants have caused background
radiation, and that if they had not been built, she would not be exposed to radioactivity. Is she correct? Why or why not? (2 points)
Yes, because power plants are the primary source of background radiation.
Ob
Yes, because radioactivity does not exist in nature.
Oc
No, because background radiation exists only in outer space.
No, because background radiation comes from naturally occurring substances such as isotopes.
Od

9

Explanation:

9ya see decontamination entery

radiation

explanation:

heat is transmitted by radiation

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.