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

These three words are the just the same. The radiopharmaceuticals are defined as a radioactive compound used for the treatment of diseases. While this also commonly called in other termed known as Radionuclides or Tracer. It is a radioactive material.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.