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Maybe you mean what does a mercury barometer measure. In which case the answer is atmospheric pressure.
A mercury barometer is an instrument which can be used to forecast the weather. The fact that there is a barometer does not affect the weather. You need to see what the barometer shows and interpret it.
No, a barometer measures air pressure, not temperature. A falling barometer generally signifies unsettled or stormy weather coming in.
it means it is going to rain
Well, an aneroid barometer, is called an aneroid barometer- but, a barometer measures air pressure, and an aneroid barometer is a barometer that contains no liquid.
You need to specify where.
74
the answer is yes
The height of the mercury column is used to measure atmospheric pressure. If the barometer is also subjected to high temperatures, the thermal expansion of the mercury column will indicate a higher pressure than is really the case. This will make the barometer readings useless.
The weight of air above you is decreasing, you are being affected by an atmospheric cyclone, OR you are climbing up a mountain.
Maybe you mean what does a mercury barometer measure. In which case the answer is atmospheric pressure.
A mercury barometer is an instrument which can be used to forecast the weather. The fact that there is a barometer does not affect the weather. You need to see what the barometer shows and interpret it.
I take it you mean on your blood pressure readings? The bottom number is the pressure the blood is returning to the heart.
No, a barometer measures air pressure, not temperature. A falling barometer generally signifies unsettled or stormy weather coming in.
Precision refers to how close the values in a set of data are with respect to each other. An indication of precision is given by the mean deviation from the mean of a set of readings (Standard deviation also will do): Mean deviation from mean = Summation (Modulus(X - mean)) / n where X denotes the individual readings and n is the number of readings taken. A small mean deviation from mean indicates high precision.
Do you mean the old barometer?
it means it is going to rain