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A mercury barometer is a device that is used to measure the atmospheric pressure at a given location. The barometer consists of a vertical glass tube that is closed at one end.
- What are the uses of barometer?
- How much mercury is in a barometer?
- What is the use of barometer in mobile phones?
- What is barometer used for Class 7?
- What do you mean by mercury barometer?
- How do you transport a mercury barometer?
- Why is mercury used in mercury barometer?
- Why is mercury used as barometric liquid Give two reasons?
- Is a mercury barometer safe?
- Are mercury barometers accurate?
What are the uses of barometer?
A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around the Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure.
How much mercury is in a barometer?
The pressure is quoted as the level of the mercury's height in the vertical column. Typically, atmospheric pressure is measured between 26.5 inches (670 mm) and 31.5 inches (800 mm) of Hg. One atmosphere (1 atm) is equivalent to 29.92 inches (760 mm) of mercury.
What is the use of barometer in mobile phones?
Whenever you (and your device) experience a change in elevation, the barometer measures the resulting pressure difference. That pressure difference augments the GPS data about your horizontal (x/y) location to produce a more accurate picture of where you are at any given time.
What is barometer used for Class 7?
A barometer is an instrument which is used to measure the atmospheric pressure at a certain place or altitude. There are many uses to a barometer. The pressure tendencies which are measured using this instrument can help in the forecasting of short-term changes in the weather conditions of a place.
What do you mean by mercury barometer?
A mercury barometer is a barometer with a column of mercury whose height varies according to the atmospheric (barometric) pressure. A barometer is an instrument for measuring atmospheric pressure, which is used in forecasting the weather.
How do you transport a mercury barometer?
The best advice we can give is to just tilt the barometer slowly and gently to 45 degrees and let the top of the tube fill with mercury, then transport the barometer at that angle. Be sure to wrap the barometer in a good, stout plastic bag to contain any possible mercury spills, and cushion it well.
Why is mercury used in mercury barometer?
Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.
Why is mercury used as barometric liquid Give two reasons?
Two advantages of using mercury as barometric liquid: (i) The density of mercury is greater than that of all the liquids, so only 0.76m height of mercury column is needed to balance the normal atmospheric pressure. (ii) The mercury neither wets nor sticks to the glass tube therefore it gives the correct reading.
Is a mercury barometer safe?
A mercury barometer in the home is no threat to your health.
Are mercury barometers accurate?
The accuracy of mercury barometers depends on the accuracy of the height measurement, density and vapor pressure of the mercury used. Mercury barometers are impractical for many industrial applications and their use has diminished over time due to their size, cost, delicate nature, and toxicity of mercury.
