Chapter 12
Problem 22
A steel ruler is calibrated
to read true at 20.0oC. A
draftsman uses the ruler at 40.0oC to draw a line on a 40.0oC
copper plate. As indicated on the warm
ruler, the length of the line is 0.50m.
To what temperature should the plate be cooled, such that the length of
the line truly becomes 0.50m?
Chapter 12
Problem 33
At the bottom of an old mercury-in-glass thermometer is a 45mm3
reservoir filled with mercury. When the
thermometer was placed under your tongue, the warmed mercury would expand into
a very narrow cylindrical channel, called a capillary, whose radius was 1.7 x
10-2 mm. Marks were placed
along the capillary of the glass that indicated the temperature. Ignore the thermal expansion of the glass and
determine how far (in mm) the mercury would expand into the capillary when the
temperature changed by 1.0