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What causes the air pressure dial to move in an aneroid barometer?
Group of answer choices

a Mercury inside the barometer rises and falls moving the dial according to the increase or decrease in pressure.

b Weights activated by air pressure change position according to the weight of the air moving a dial on the instrument.

c A spring inside the instrument, connected to a dial, moves when the air pressure contacts the spring.

d A small flexible metal box expands and contracts which is connected to the instrument's dial.

Sagot :

babyrose13

Answer:

You can clearly see the spring that makes the pointer rise or fall as the pressure changes. ... A spring is cunningly attached to the box and, as the box moves in and out in response to the changes in air pressure, the spring expands or contracts and moves the pointer on the dial.......i'm going to say C

purpleberryyyy

Answer: the answer is actually D.

Explanation: that is if you still need it

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