Question
What causes the air pressure dial to move in an aneroid barometer?
A small flexible metal box expands and contracts which is connected to the instrument's dial.
Weights activated by air pressure change position according to the weight of the air moving a dial on the instrument.
A spring inside the instrument, connected to a dial, moves when the air pressure contacts the spring.
Mercury inside the barometer rises and falls moving the dial according to the increase or decrease in pressure.
Answers
GPT-4o mini
The correct answer is:
**A small flexible metal box expands and contracts which is connected to the instrument's dial.**
In an aneroid barometer, the flexible metal box (called an aneroid cell) changes shape in response to variations in air pressure. As the air pressure increases, the cell compresses; as the pressure decreases, it expands. These movements are then transmitted through mechanical linkages to move the dial, indicating the air pressure.
**A small flexible metal box expands and contracts which is connected to the instrument's dial.**
In an aneroid barometer, the flexible metal box (called an aneroid cell) changes shape in response to variations in air pressure. As the air pressure increases, the cell compresses; as the pressure decreases, it expands. These movements are then transmitted through mechanical linkages to move the dial, indicating the air pressure.