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Cards (17)
P
=
K
*
V3
P
=
Power
V
=
always
given
K
=
constant
E
=
P
*
T
Q
=
C
*
M
*
^T
Q
=
U
*
A
*
^T
N
=
P
used
-
P
tot
X
100%
N
=
efficiency
E
=
energy
C
=
heat
of
water
^T
=
temperature
increase
M
=
mass
U
=
value
of
wall
Qw
=
heat
loss
per
second
A
=
surface area
of
wall
in
m2
Qw
=
U
*
A
*
^T
