Decide whether each statement describes the life cycle of a low-mass star or a high-mass star. when a -mass star leaves the main sequence, it becomes a red giant before creating a planetary nebula and becoming a white dwarf. when a -mass star leaves the main sequence, it becomes a red supergiant before creating a supernova and becoming either a neutron star or black hole.

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?