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Chapter 28
133
Q28.31
Two runs in series:
. Three runs in parallel:
. Junction of one lift and
two runs:
.
Gustav Robert Kirchhoff, Professor of Physics at Heidelberg and Berlin, was master of the
obvious. A junction rule: The number of skiers coming into any junction must be equal to the
number of skiers leaving. A loop rule: the total change in altitude must be zero for any skier
completing a closed path.
SOLUTIONS TO PROBLEMS
Section 28.1
Electromotive Force
P28.1
(a)
P
=
∆
V
R
a
f
2
becomes
20 0
11 6
2
.
.
W
V
=
af
R
so
R
=
673
.
Ω
.
(b)
∆
VI
R
=
so
11 6
6 73
..
V
=
I
Ω
and
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .
 Fall '11
 Staff
 Physics

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