A mercury thermometer consists of a small glass bulb containing mercury metal connected to a glass capillary tube. when the volume of mercury increases, the mercury moves up the capillary. Suppose the capillary tube is 0.4 mm in diameter and the total volume of mercury in the bulb and capillary is 0.30 cm 3 at a room temperature. if the thermometer is now placed in hot water and the length of the column of mercury in the capillary changes by 5.0 cm, what is the difference in temperature between the hot water and the room? the thermal expansivity of mercury is ß=1.8*10-4 K-1.