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The boundary of an electron cloud represents the region where there is a high probability of finding an electron. It helps define the size and shape of the atom or molecule, influencing its chemical properties and interactions with other atoms. The boundary also signifies the extent of the electron's influence on the surrounding environment.
The size of an atom refers to the typical distance from the nucleus to the boundary of the surrounding cloud of electrons.
The heliopause marks the outer boundary of our solar system. This is where the solar wind from the Sun meets the interstellar medium of space.
S.A Smith has written: 'Turbulent fluxes in cumulus cloud capped boundary layers'
The atomic radii is the measure of the size of the atoms in a chemical element. This is the distance from the nucleus to the boundary of the electrons' cloud.
The cloud that forms along the leading edge of a gust front is called a shelf cloud. It is a wedge-shaped cloud that signifies the boundary between cool air from a thunderstorm downdraft and the warm air ahead of the storm. Shelf clouds can appear ominous but they usually do not produce severe weather on their own.
its impossible because a cloud is water or fog and its no longer cloud by then.On the other hand, well it is possible and happens permanently but if some piece of foggy cloud descended and crossed the bottom boundary of the visible cloud, the environmental conditions ( mainly the pressure ) let this cloud piece to transform to invisible vapour.Vise versa some piece of air with water vapour could ascend and by crossing the bottom boundary of the visible cloud transforms to a fog.
As of now, we have not observed any objects or phenomena beyond the Oort Cloud. The Oort Cloud is the theoretical boundary of the solar system, so anything beyond it would be in interstellar space. Technology limitations make it difficult to observe objects at such extreme distances.
Atomic size is defined as the distance between the nucleus and the outermost electron in an atom. Since electrons occupy regions of space called orbitals, which have fuzzy boundaries, it is difficult to pinpoint an exact boundary of an atom. Additionally, the electron cloud distribution is not uniform, making the atomic size less precise.
Voyager 1 and Voyager 2 have both left the heliosphere, but neither has left the solar system. The edge of the solar system is considered to be the outer boundary of the Oort Cloud, The exact width of the Oort Cloud is not known, but its estimated that it would take Voyager 2 about 300 years to reach the inner boundary of it. To reach the outer boundary of the Oort Cloud, truly leaving the solar system, would take Voyager 2 something like 30,000 years.
Steady rain is typically caused by a prolonged weather system, such as a low-pressure system or a frontal boundary, that brings moisture-laden air and sustained precipitation over an area for an extended period of time. This can result in a consistent and continuous rainfall.
We have no direct evidence, but theory indicates that the inner boundary of the Oort cloud would be out past Pluto, at about 100 AU, and might extend for up to 20,000 AU or more. It might extend as far as one light-year out, but something that far out would be very tenuously held by the Sun's gravity.