In which group do the particles contain only nucleons?
a. protons and electrons
b. neutrons and electrons
c. protons and neutrons
d. protons, neutrons, and electrons

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

you need to stop taking that class

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.