This Type of Thermometer Has a Glass Bulb Attached to a Sealed,graduated

question 23

Multiple Choice

This type of thermometer has a glass bulb attached to a sealed,graduated tube about 25 cm (10 in.) long.A very small opening,or bore,extends from the bulb to the end of the tube.A liquid in the bulb (usually mercury or red-colored alcohol) is free to move from the bulb up through the bore and into the tube.When the air temperature increases,the liquid in the bulb expands,and rises up the tube.When the air temperature decreases,the liquid contracts,and moves down the tube.Hence,the length of the liquid in the tube represents the air temperature.

• A)liquid-in-glass thermometer
• B)mercury thermometer
• C)​maximum thermometer
• D)​minimum thermometer
• E)​thermistor

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