B. moving electric charges, hope this helps :)
Coal plants use a boiler to produce steam.
Yes because if not people wouldn't understand how did you calculate electric field strength.
Answer: The volume is decreasing at a rate of 80 cm3/min
Explanation: Please see the attachments below
There are several possibilities. Here are a few that occur to me:
-- If Point-A is the summit of Pike's Peak, he may feel somewhat
short of breath.
-- If Point-A is his grandmother's house, he may feel a great sense
of pleasant anticipation.
-- If Point-A is his office on Monday morning, then he may feel
a tightening sensation in his chest.;
-- If Point-A is his home on Friday afternoon, then he feels the
effects of a slow and steady drop in his blood pressure.
I finer point might be put to it if we had any idea of where
Point-A is, and what it represents in the grand scheme
of things.