# The coefficient of volumetric expansion of mercury is 18×10^-5/°C. A thermometer bulb has a volume 10^-6 m3 and cross section of stem is 0.004 cm^2.

Q: The coefficient of volumetric expansion of mercury is 18×10-5/°C. A thermometer bulb has a volume 10-6 m3 and cross section of stem is 0.004 cm2. Assuming that bulb is filled with mercury at 0°C then the length of the mercury column at 100°C is

(a) 18.8 mm

(b) 9.2 mm

(c) 7.4 cm

(d) 4.5 cm