Torricelli’s Experiment
* Wear gloves when handling mercury. Torricelli’s Experiment The first person to measure the magnitude of air pressure is Italian scientist Toricelli. He was filled with mercury (Hg) in a glass tube…
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Atmosphere Simulation
Galileo’s Pump Problem
Galileo’s Pump Problem A duke living in Tuscany, Italy, in the 17th century, installed a well in the courtyard of the palace. But, duke saw the pump fail to pull water up.…
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The Highs and Lows of Air Pressure
High atmospheric pressure and low atmospheric pressure The cause of wind blowing is the difference in air pressure. A high pressure system has higher pressure at its center than the areas around…
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Atmosphere
Let’s observe dramatic changes in the number of air molecules. Atmosphere The various gases surrounding the Earth are called the atmosphere. The atmosphere is distributed from the Earth’s surface to about 1,000…
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Pressure and Pressing Area
Pressure is defined as force per unit area. It is usually more convenient to use pressure rather than force to describe the influences upon fluid behavior. The standard unit for pressure is…
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Equilibrium of Radiation
Radiation Places near the stove feel warmer than places far away. This is due to the direct transfer of heat from the stove without the movement of matter. This direct transfer of…
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Coriolis Effect
Coriolis effect The French mathematician Coriolis first explained that the direction of fluid movement on the Earth’s surface is slightly warped. You can observe this effect in all spinning places like Earth.…
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Graph of Saturated Vapor 2
Water vapor in the air Liquid water can evaporate and turn into water vapor in the air. Conversely, water vapor in the air may turn back into water. Some are very dry,…
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Psychrometer(hygrometer)
A hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer. Dry-bulb is a ordinary thermometer. And wet-bulb is the thermometer with wet sock. Thus, wet-bulb measured a little lower due to…
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Graph of Saturated Vapor
Water vapor in the air Liquid water can evaporate and turn into water vapor. Conversely, water vapor in the air can turn into water again. The desert is very dry without any…
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