what are characteristics of unstable air?
438324
Cumuliform clouds and showery precipitation. 3413. What are characteristics of unstable air? Turbulence and good surface visibility.
1112102
['Sustained wind or frequent gusts of 35mph or greater.', 'Considerable falling and/or blowing snow reducing visibility to under a quarter mile.']
1073380
Subcritical flow is dominated by gravitational forces and behaves in a slow or stable way. It is defined as having a Froude number less than one. Supercritical flow is dominated by inertial forces and behaves as rapid or unstable flow. ... Supercritical flow has a Froude number greater than one.
420062
Moderate turbulence is similar to light turbulence but somewhat more intense. There is, however, no loss of control of the airplane. ... Severe turbulence causes large and abrupt changes in altitude and/or attitude and, usually, large variations in indicated airspeed. The airplane may momentarily be out of control.
863119
['working under suspended loads.', 'visibility.', 'attaching / detaching and securing loads.', 'environment.', 'location.', 'overturning.', 'proximity hazards.', 'derating.']
903694
['air.', 'pressure.', 'envelope.', 'heavens.', 'sky.', 'troposphere.', 'substratosphere.']
36085
Stable air means that the weather is likely to be calm. It may rain or snow slowly and steadily, it may be sunny, but the weather will not change quickly. Unstable air means that the weather might change quickly with very little warning. Unstable air leads to sudden thunderstorms.
799941
Four major types of air masses influence the weather in North America: maritime tropical, continental tropical, maritime polar, and continental polar. The characteristics of an air mass depend on the temperatures and moisture content of the region over which the air mass forms.
1227290
Sinking air is dry and characterized by a lack of clouds and precipitation. These regions of subtropical high pressure systems are known for their tranquil weather. Air masses flowing equatorward from these high pressure belts form the Trade Winds that feed the ITCZ, thus completing the Hadley Cell circulation.
1198155
[' Air pressure in car tire supports the weight of the car.', ' Sucking a drink through a straw - fluid flows because of pressure difference.', ' Aircraft fly because of the air pressure on the wings.', ' Bullet fired from a gun is driven by gas pressure.', ' Toy balloon inflates because of air pressure inside.']
712992
Stability is a description of the disc's flight path. Understable means a flight that turns right ( RHBH throw). Stable is a flight that doesn't turn. Overstable refers to a flight that turns left ( RHBH throw).
1125466
['Sustained pressure. ... ', 'Friction. ... ', 'Shear.']
1342715
Tornado or Waterspout. FG Fog. FU Smoke. FZ Freezing. GR Hail (>5mm)
1355898
The basic cause is entrained air within the fluid caused by mechanical or chemical processes. ... Unstable foam is often caused by high levels of agitation in the fluid system and does not cause much of a problem in machining operations; its large bubbles break quickly and dissipate.
960704
A high concentration can displace oxygen in the air. If less oxygen is available to breathe, symptoms such as rapid breathing, rapid heart rate, clumsiness, emotional upsets and fatigue can result. As less oxygen becomes available, nausea and vomiting, collapse, convulsions, coma and death can occur.
477457
['Moisture-to form clouds and rain.', 'Unstable Air-relatively warm air that can rise rapidly.', 'Lift-fronts, sea breezes and mountains are capable of lifting air to help form thunderstorms.']
437448
Cumulonimbus clouds indicate very unstable atmospheric conditions.