75
p = w / t
p = 180 / 2.4
p = 75
Air is a poor conductor of heat. The air trapped between the two panes is a pretty good <em>insulator</em>. It does a lot to prevent heat from flowing through the windows ... keeping heat IN during the Winter, and OUT during the Summer.
Answer: Salt and A moving baseball
Explanation: Just got 100 on the quiz.