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-----Original Message-----
From: Phys-l [mailto:phys-l-bounces@mail.phys-l.org] On Behalf Of Robert
Cohen
Sent: Friday, February 16, 2018 4:36 PM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] Electric Current ... including steady current in a loop
On Friday, February 16, 2018 2:28 PM, Jeffrey Schnick wrote:
But to say that one part of the flow of something through a closedthough.
surface, or the flow of something through an open surface, is the rate
of change in the amount of that something, bothers me; I can live with it
I was hoping I was missing something.
To me, they are two different usages of "dq" that happen to be equal in this
case. :)
Just curious -- are you also bothered by figuring out the total mass of a ball by
cutting it into pieces of mass dm and then integrating? In other words, does
the use of "dm" bother you because there isn't a quantity m that is
undergoing change during the integration?
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