What is the relationship between radiopharmaceuticals, tracers, and radionuclides?

They are all radioactive

Explanation:

Radiopharmaceuticals, or medicinal radiocompounds, are a group of pharmaceuticals that contain radioactive isotopes. Radiopharmaceuticals are used as diagnostic and therapeutic agents.

A radioactive tracer, is a chemical compound in which one or more atoms have been replaced by a radionuclide so that as a result of of its radioactive decay the nuclide can be used to explore the mechanism of chemical reactions by carefully tracing the path that the radioisotope follows from reactants to products.

Radionuclides are species of atoms that emit radiation by undergoing radioactive decay leading to the emission of alpha particles (α), beta particles (β), or gamma rays (γ).

From the foregoing, radiopharmaceuticals, tracers, and radionuclides are all radioactive materials. Hence the answer.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

well clustered together.

points close on a scatter diagram