A manufacturer wishes to design a thermo meter so that the mercury must travel a greater distance up the stem for each degree change in temperature. The manufacturer can achieve this goal by :
a) decreasing the volume of liquid contained in the thermometer
b) decreasing cross-sectional area of thermometer stem
c) using liquid with a larg coefficient of volume expansion
d) reducing size of bell

Options

A. Both a and b are true
B. Both b and c are true
C. only a is true
D. only c is true

Answer

B