what is normal atmospheric pressure how is it measured what is its significance
the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. A simple barometer consists of a long glass tube (closed at one end, open at the other) filled with mercury and turned upside down into a container of mercury.
IMPORTANCE OF ATMOSPHERIC PRESSURE
It creates wind.
It influences weather.
Weather forecasting.
Now i think all your doubts are clear...
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. A simple barometer consists of a long glass tube (closed at one end, open at the other) filled with mercury and turned upside down into a container of mercury.
IMPORTANCE OF ATMOSPHERIC PRESSURE
It creates wind.
It influences weather.
Weather forecasting.
Now i think all your doubts are clear...