What is the common uses that technetium use??? Hel hel

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Gymnast always perform on padded mats. how does the mats protect the gymnast

Type the letter that represents the correct location for each particle type below.