Question

What do the following indicate in a barometer regarding weather: Gradual rise in the mercury level.

Answer 1

Hint:We know that the barometer is a device used to measure atmospheric pressure. There are two types of barometers, mercury and aneroid. In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured.

Complete answer:
As we know, the barometer is an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude. 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.

This liquid form of mercury is especially dangerous because it vaporizes at room temperature. If mercury vapor is inhaled, it is easily absorbed by the body, where it first gets into the lungs and from there into the blood and the brain. A Barometer is an estimating apparatus which is used to measure the atmospheric pressure. It is particularly used in weather forecasting and to discover the altitude.

A non-liquid barometer called the aneroid barometer is used in portable instruments and in aircraft altimeters because of its smaller size. It contains a flexible-walled evacuated capsule, the wall of which deflects with changes in atmospheric pressure. Gradual rise in mercury level is equal to good weather conditions or sunny days. Thus, no possibility of rain.

Note:Remember that the glass tube is immersed in the mercury the air pressure in the atmosphere presses the surface of the mercury. This causes some of the mercury in the tube to rise up inside the tube. The mercury inside the tube rises if the air pressure in the atmosphere is greater. When there is less atmospheric pressure the rise of mercury in the tube is less.