Question 27:
3 is correct because at higher altitudes, less air means less weight and less pressure; pressure and density of air decreases with increasing elevation. 作者: Peter_ng 時間: 2012-12-29 09:59 PM
High altitude-->thin atmosphere-->less dense-->low pressure 作者: skn 時間: 2013-6-2 01:07 AM
first question :
higher -> less air -> less weight -> less pressure ?
