건습구습도계 Psychrometer(hygrometry)


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 the evaporation heat. Their difference indicates the dryness…
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압력과 면적의 관계 Pressure and Pressing Area

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 the Pascal, which is a Newton per square…
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