Which phrase describes how scientists define a system?

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

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

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?