8. A sample of an unknown substance has a volume that is independent of its container. Which additional information is needed to determine the state of the sample?
A. the mass of the sample
B. the density of the sample
C. whether the sample has a fixed shape
D. whether the sample conducts electricity

the form of energy changes and the total energy increases0l

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.