Barometer - Wikipedia
WebA barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries .
Barometer | Definition, Types, Units, & Facts | Britannica
WebApr 22, 2024 · A barometer is a device used to measure atmospheric pressure. Because atmospheric pressure changes with distance above or below sea level, a barometer can also be used to measure altitude. There are two main types of barometers: mercury and aneroid. Learn more about barometers in this article.
Barometer - National Geographic Society
WebOct 24, 2023 · A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.
How do barometers work? - Explain that Stuff
WebJul 3, 2022 · Instruments that measure air pressure are called barometers and people have been using them for weather forecasting and scientific research for hundreds of years. Let's take a closer look at how they work!
How Is Barometric Pressure Measured and Why? | HowStuffWorks
WebFeb 27, 2024 · What Is a Barometer? A barometer is a scientific instrument designed to measure barometric pressure. Barometers as we know them date back to 1643 when the Italian inventor Evangelista Torricelli measured air pressure using a glass tube filled with mercury and open on its downward-pointing end.
Barometer Definition & Meaning - Merriam-Webster
WebThe meaning of BAROMETER is an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude. How to use barometer in a sentence.
Learn How to Read a Barometer - ThoughtCo
WebMar 4, 2020 · A barometer is a device that reads atmospheric pressure. It uses liquid mercury to predict the weather by tracking atmospheric pressure changes resulting from the movement of warm and cold weather systems.
How Barometers Measure Air Pressure - ThoughtCo
WebJul 3, 2019 · A barometer is a widely used weather instrument that measures atmospheric pressure (also known as air pressure or barometric pressure) -- the weight of the air in the atmosphere. It is one of the basic sensors included in weather stations.
Explained: How the barometer was invented | Britannica
WebAir pressure’s relationship to height can be measured by a barometer, one of the first instruments invented to study the atmosphere. The development of the barometer began at the end of the 16th century. Galileo Galilei used water and air in an inverted glass vessel to study temperature.
Atmospheric pressure - Wikipedia
WebAtmospheric pressure, also known as air pressure or barometric pressure (after the barometer ), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars, [1] 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. [2] .
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