Question

A decrease in the height of a column in a mercury barometer means that _____. air pressure is increasing wind speed is increasing air pressure is decreasing air pressure is being deflected by the coriolis effect

Answer 1

I think it's "air pressure is decreasing".

Answer 2

Correct answer is air pressure is decreasing

Step-by-step explanation:

Atmospheric pressure is usually measured with the help of barometer. A barometer consist of a glass tube in which there is a column of mercury. This column of mercury changes with the changing weight of the atmosphere. It means height of mercury column depend on air pressure.Height of height of a column in a mercury barometer is directly proportional to atmospheric pressure.Therefore a decrease in the height of a column in a mercury barometer means that air pressure is decreasing.