If the pressure of the air outside the jar is higher than inside (high pressure), it will push down on the balloon and the balloon lid will sink and the straw will point up. If the air pressure outside the jar is lower than inside (low pressure), the balloon will swell outwards and the straw will point down.Mar 14, 2017
(Or mercurial barometer; formerly called Torricelli’s tube.) The basic construction, unchanged since Torricelli’s experiment in 1643, is a glass tube about three feet long, closed at one end, filled with mercury, and inverted with the open end immersed in a cistern of mercury. …
A mercury barometer has a glass tube that is closed at the top and open at the bottom. At the bottom of the tube is a pool of mercury. The mercury sits in a circular, shallow dish surrounding the tube. The mercury in the tube will adjust itself to match the atmospheric pressure above the dish.
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. The barometer works by balancing the mercury in the glass tube against the outside air pressure, just like a set of scales.
The common instruments of measure are anemometer, wind vane, pressure sensor, thermometer, hygrometer, and rain gauge.
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.
A water barometer or storm glass is used to predict stormy weather. It works because of changes in atmospheric pressure. … The top of the spout is above the water level and open. When air pressure sinks lower than when the body was sealed with water, the water level in the spout rises above the level in the body.
Mix ½-cup water with 10 drops of food coloring in a separate container. Gently add the colored water, spoonful by spoonful, to the top of the shaving cream. When it gets too heavy, watch it storm!
The first mercury filled glass tube was generally accepted to have been invented in 1643 by Torricelli, which became known as Torricelli’s mercury barometer. In this he produced a vacuum by filling a glass tube with mercury, inverting it and then submerging the open end in a vessel of mercury.
Place a plastic bottle upside down inside the cup. … The mouth of the bottle must be below the waterline but not touching the bottom of the cup. Use a marker to note the water level on the side of the cup. Check the barometer after a couple of days.
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