Physical geography

Physical geography

Industry: Geography

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Physical geography

Unstable equilibrium

Geography; Physical geography

In an unstable equilibrium the system returns to a new equilibrium after disturbance.

Upper air westerlies

Geography; Physical geography

Consistent winds that exist in the upper troposphere that flow east to west from about 20° of latitude to the poles.

Upper mantle

Geography; Physical geography

Layer of the Earth's interior extending from the base of the crust to 670 kilometres below the surface. Part of the Earth's mantle layer. The upper mantle is composed of peridotite, an ultramafic ...

Upslope fog

Geography; Physical geography

Fog produced by air flowing over topographic barriers. As the air is forced to rise, it is cooled by adiabatic expansion. Upslope fog is most common on the windward slopes of hills or mountains.

Urban area

Geography; Physical geography

Geographic area with a high density of people over a limited area. Homes and other types of buildings tend to be close together. Urban systems also tend to differentiate themselves spatially into ...

X-ray radiation

Geography; Physical geography

Form of electromagnetic radiation with a wavelength between 0.03 to 30 nanometers.

This radiation law suggests that the wavelength of maximum emission of any body is inversely proportional to its absolute temperature. The following equation mathematically describes this law: lmax = ...