Answers

2014-10-20T21:41:48+08:00
A body of air with horizontally uniform temperature,humidity,and pressure
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2014-10-21T03:31:06+08:00
Mass is quantity of matter contained in an object.air mass means quantity of air in an object
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anything that occupies space is matter and quantity of matter contained in an object is mass or massof air =volume of air/density of air