What are humidity measurements based upon?

Moisture in the air is called humidity. There are different measurements of humidity including absolute humidity.

Wet-bulb/dry-bulb humidity, relative humidity, vapor pressure, and dew point are the most common types of measurements performed by industrial humidity instruments.

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Relative humidity is recorded in percentages.

The Richter scale is based on measurements of *Amplitude*. (^_^)

temperature and humidity

They compare because relative humidity measures the maximum amount of moisture in the air.

Everything that has to do with civil engineering is based upon the measurements of land surveying. Surveying gives the measurements that are vital to build things such as buildings, bridges, tunnels and other important things.

2 instruments are required to accomplish these measurements: a barometer to measure atmospheric pressure. a hygrometer to measure humidity.

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Storm chasers may take measurements of temperature, humidity, pressure and wind speed, though many do not take any measurements.

Practically all measurements are based on physics.

Critical measurements are those measurements that an opinion will be based on. Non-critical measurements are not used for deriving an opinion, and can be provided as approximate.

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Relative humidity is ratio between the current and maximum humidity possible in the air. This varies based on the air temperature, pressure, and other atmospheric conditions.

The world system of measurements units is based on the metric system (SI).

Temperature and humidity are the measurements commonly used to assess the pleasantness of weather. These affect most how hot or cold it "feels" outside.

The word humidity does have a plural, humidities, but the state of "being humid" itself is uncountable. What we actually measure as humidity is the relative humidity, comparing it to the maximum possible at that pressure and temperature. Referring to these measurements as "relative humidities" would not be grammatically incorrect, but you could also use the singular just as well. ("We're going to compare the relative humidity in Texas and Oklahoma.")

No, they are based upon latin words.

Conclusions are based upon prior research and evidence gathered. In a written work, a conclusion will be preceded or followed by the research upon which that conclusion is based.

Metric measurements use powers of 10 to create larger and smaller units.

Measurements are made in units. The specific units that you would use depend upon what it is that you wish to measure. Practically anything can be measured.

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Specific humidity is the amount of water vapor found in a specific amount of air, and is measured in grams and kilograms, respectively. Relative humidity is percentage measurement of humidity based on the air temperature, where the humidity is comparing how much could be in the air versus how much is actually in the air.

B. Temperature C. Air pressure D. Relative humidity