Should I clean my room please I need to know ​

Which of the following represents an upside-down image?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?