Answer to Problem 27
To use equation (3.4) to evaluate q, we must employ
a consistent set of units. (See the remarks
following equation (2.1).) In units of
Kelvin,
and
, so
.
.
Therefore

Equation 16
Thus, heat flows through a square meter at the rate of 7,600 watts (or Joules per second). (Recall that a Joule is a unit of energy.)