The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R
Attached Figure / Diagram
A
Alcohol, mercury and alcohol
B
Air, alcohol and mercury
C
Mercury, alcohol and mercury
D
Air, mercury and alcohol
Verified Correct Answer: A.
Physical Principles & Numerical Solution
The Six's maximum and minimum thermometer uses a liquid-filled bulb connected to a U-shaped tube with a mercury thread. As the liquid expands or contracts, the mercury moves, pushing the steel indexes to indicate the maximum and minimum temperatures, which can be reset using a magnet.
Source: Myschool Past Questions Archive (Record #11716)