What Is Air?

 

Penelitian ini melihat beberapa faktor yang memungkinkan bersiap pada waduk wonogiri. Semua tersebut harus diambil berdasarkan kriteria perencanaan jaringan irigasi, koefisien tanaman untuk palawija, dan sistem giliran.

Hasil dari pengambilan yang disertifikasi menunjukkan bahwa rata-rata debit inflow andalan waduk wonogiri adalah 13,59 m3/dt.

Air Temperature

Air temperature is a measure of the kinetic energy of the gas molecules that make up the atmosphere. The higher the air temperature, the more kinetic energy it has. Temperature is determined by the rate at which these molecules move, and this in turn is affected by the amount of solar radiation that hits the Earth’s surface and a number of other factors.

Air temperatures are usually expressed in Celsius and Fahrenheit. They are also used to determine precipitation patterns and types, such as rain or snow.

Curah hujan efektif merupakan jumlah yang diperlukan untuk evapotranspirasi tanaman, perkolasi, dan lainnya yang memungkinan kebutuhan irigasi yang harus diberitahu. Ini adalah tindakan yang berbeda dari keseluruhan embung dengan kebutuhan pertanian dan kriteria standard.

Air Pressure

Air pressure is the weight of air molecules pressing down on a surface. It increases as the number of air molecules above that surface increases, and decreases if the number decreases. Air pressure is measured by a device called a barometer, which has a column of mercury that rises or falls with changes in the weight of the atmosphere. Meteorologists also refer to it as atmospheric pressure or barometric pressure.

Air molecules are constantly moving, Andalan69.com colliding with each other and with the walls of any container they encounter. When the number of molecules above a surface increases, the total force exerted on that surface by those molecules increases and the pressure increases.

The normal pressure at sea level is 1013.2 millibars (abbreviated as mb). In addition to mb, meteorologists use the unit of pascals (1 hectopascal or hPa) as well, which is defined as one kilogram per square centimeter. The units of pressure used on weather maps are both millibars and pounds per square inch (psi). Air pressure varies over the course of a day, with areas of high pressure associated with clear weather.

Air Humidity

Humidity refers to the amount of water vapor in the air. Humidity can be measured by either relative humidity or specific humidity. Relative humidity is the amount of water vapor in the air as a percentage of the maximum it could hold at a given temperature. It depends on temperature because colder air can hold less water vapor than warm air.

A molecule of water has much less mass than a molecule of oxygen or nitrogen (which makes up the vast majority of dry air molecules). Since moist air is lighter, it tends to rise by natural convection. This is a key factor behind thunderstorms and other weather phenomena. The right level of humidity in the air is also important to human well being. It prevents mucus membranes from drying out, reduces the risk of respiratory diseases and supports a high level of work performance. It is also an important factor in the control of mold growth and other organic contaminants.

Air Velocity

Air velocity is the movement of air molecules around a space. It is a measure of how fast the air moves in a given direction and can be converted to wind speed (miles per hour).

A common way of measuring the air velocity is with a hot-wire anemometer or a smoke tube. These devices are suitable for measuring higher velocities of air, i.e. above 750 feet per minute. Accurately measuring low velocities is more difficult.

The air velocity can impact the rate at which heat is transferred between a surface and the air surrounding it. For example, a fan might be used in an animal shelter to increase the air velocity at the animal level which can allow for greater sensible heat transfer from animals to the warmer surrounding air. However, in some circumstances a high air velocity can be detrimental to human occupants such as the sensation of a cold downdraught from a window.