- #1
felipe douglas
- 7
- 0
Homework Statement
Your house will have several skylights. To minimize heat flow, each skylight will have two transparent panes separated by an intermediate layer. Since visibility through the skylight isn't important, the gap between the panes will be filled with aerogel: a porous, ultralight translucent material that is almost 100% gas. Why not just use the gas alone? Why add the porous framework of the aerogel?
a. During the cold winter, natural buoyance causes gas to rise from the cooler lower pane to the hotter upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the upper pane to the lower pane. The porous framework prevents such convection.
b. During the cold winter, natural buoyance causes gas to rise from the hotter lower pane to the colder upper pan. Many convection cells develop in between the panes and heat is carried efficiently from the lower pane to the upper pane. The porous framework prevents such convection.
c. During the hot summer, natural buoyance causes gas to rise from the hotter lower pane to the colder upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the lower pane to the upper pane. The porous framework prevents such convection.
d. During the hot summer, natural buoyance causes gas to rise from the cooler lower pane to the hotter upper pane. Many convection cells develop in between the panes and heat is carried efficiently from the upper pane to the lower pane. The porous framework prevents such convection
Homework Equations
none
The Attempt at a Solution
C? because Natural buoyancy causes hotter air to rise in colder air.[/B]