>>11469000I was right, you were wrong.
Get fucked pseuds.
>It weighs the same whether the fly is hovering in themiddle of the jar or landed on the floor of the jar. Basically, when you weigh the jar you are weighing the jar and all of its contents. Another example, if the jar has air in it, the jar will weigh more than a jar that has been evacuated and just contains a vacuum.
>Long answer is that it does depend slightly on whether the fly is moving (well, actually, whether the fly is accelerating). With the fly in the air the jar could weigh more or less than with the fly standing on the floor of the jar, depending on whether the fly begins moving up or down. Let's just say the average weight of the jar+air+fly when the fly is flying is the same as the weight with the fly on the floor of the jar.">"Since the jar is closed when it is weighed all of its contents are being weighed. (jar, lid, air, and flies no matter the positin of the flies.) The flies in motion would still put pressure on the air then the jar then the scale." 
