What is a difference between a 90°c cup of water and a 40°c cup of water?

Two things that biomedical has invented or innvated

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity