Which best describes what solid-state physics studies? - how quantum theory explains the large-scale properties of solids - how the atomic scale structure of solids explains their large-scale properties - how the large-scale structure of solids explains their atomic scale structure - how the large-scale properties of solids explains quantum theory

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

I’ve been stuck on this for a while

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?