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# The cause of floating clouds in the atmosphere is:$\left( A \right)$ Low viscosity.$\left( B \right)$ Low temperature.$\left( C \right)$ Low pressure.$\left( D \right)$ Low density.

Last updated date: 10th Aug 2024
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downward-facing extent of such a particle is proportional to the ${r^2}$. Thus, as a small water drop grows, its mass becomes additional necessary than its form and therefore the droplet falls quicker. Even an outsized droplet having a radius of a hundred microns incorporates a fall rate of solely regarding $27cm/s$.
And since ice crystals have additional irregular shapes, their fall velocities are comparatively smaller. Upward vertical motions, or updrafts, within the atmosphere conjointly contribute to the floating look of clouds by compensating the tiny fall velocities of their constituent particles. Clouds typically kind, survive and grow in the air that's moving upward. Rising air expands because the pressure thereon decreases, which grows into thinner, high-altitude air causes cooling. Enough cooling eventually makes vapor condense, which contributes to the survival and growth of the clouds. Stratiform clouds (those manufacturing steady rain) generally kind in an atmosphere with widespread however weak upward motion; convective clouds (those inflicting showers and thunderstorms) are related to updrafts that exceed some meters per second. In each case, though, the atmospherical ascent is decent to negate the tiny fall velocities of cloud particles. Another way let's say the relative lightness of clouds is to check the full mass of a cloud to the mass of the air during which it resides. Contemplate a theoretical however typical little cloud at associate degree altitude of $10,000$ feet, comprising one metric capacity unit and having a liquid water content of $1g/{m^3}$.