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Clouds

A cloud is a visible body of very fine water droplets or ice particles suspended in the atmosphere at altitudes up to several miles above sea level. They are generally produced by the condensation of water vapor. Other clouds, less commonly seen, are composed of smokes or dusts.

10,186 Questions

The Si unit for measuring pressure?

Pascal. The pascal is equal to one newton per meter squared, or one kilogram per meter per second squared.

Is water vapor a solid liquid or a gas?

Water (H2O) comes in three different physical states; liquid, solid and gas. Water vapor is water in a gaseous state. Water vapor can be produced from the evaporation or boiling of liquid water or through the sublimation of ice. Typically water vapor is constantly being created by evaporation. Unlike the solid or liquid state of water, water vapor is not visible to the human eye.

What is the movement of the chest that brings air into lungs and takes out waste gases called?

The movement of the chest that brings air into the lungs is called inhalation, and it is facilitated by the contraction of the diaphragm and intercostal muscles. Exhalation is the process of removing waste gases from the lungs, which is typically a passive process where the diaphragm and intercostal muscles relax.

When water is heated the temperature eventually reaches a plateau what does the plateau indicate?

The plateau indicates that the water has reached its boiling point, where the temperature remains constant as the water undergoes a phase change from liquid to gas. Additional energy input is needed to facilitate this phase change rather than increasing the temperature.

What must happen to water vapor for it to become liquid water?

Energy must be added to liquid water so that it reaches the boiling point, at which point the water will vaporize into water vapor.

What does water need energy for to become water vapor?

Water needs energy to break the hydrogen bonds between water molecules and overcome intermolecular forces that hold the liquid together. This energy allows the water molecules to gain enough kinetic energy to escape into the air as water vapor.

What happens to a cold air when a warm air moves into a region?

When warm air moves into a region occupied by cold air, the warm air will rise above the cold air due to its lower density. This results in the cold air being displaced and pushed out of the region, a process known as warm air advection. This movement can lead to changes in temperature, pressure, and weather patterns in the region.

How it is possible to produce artificial rain by spreading dry ice in very cold clouds?

The need to develop and improve rain-making techniques in terms of design, operation, monitoring and evaluation by giving them a more scientific character is today's need.

This includes using computers to study cloud formations and help the rain-making operations achieve the goals of the project. The role of weather modification, or rain-making, is an important component in water resource management.

The process involved in artificial rain-making involves three easy-to-understand stages. The first stage is agitation. That is using chemicals to stimulate the air mass upwind of the target area to rise and form rain clouds.

The chemicals used during this stage are calcium chloride calcium carbide, calcium oxide, a compound of salt and urea, or a compound of urea and ammonium nitrate. These compounds are capable of absorbing water vapour from the air mass, thus stimulating the condensation process.

The second stage is called building-up stage. Here the cloud mass is built up using chemicals such as kitchen salt, the T.1 formula, urea, ammonium nitrate, dry ice, and occasionally also calcium chloride to increase nuclei which also increase the density of the clouds. In the third stage of bombardment chemicals such as super-cool agents: silver iodide and dry ice are used to reach the most unbalanced status which builds up large beads of water (Nuclei) and makes them fall down as raindrops.

In planning every stage a high degree of expertise and experience is required, in selecting the types and amounts of chemicals to be used, while taking into consideration weather conditions, topographical conditions, wind direction and velocity as well as the location or delimitation of the area for chemical seeding. Several other ideas are also involved in rain making. Rockets containing rain-making chemicals can be fired into the clouds either from the ground or from aircraft.

A jet of rain-making chemicals is shot from a highly pressurised cannister directly into the cloud base, so as to coerce clouds which normally hang above mountain tops to cluster up and rain on the mountain or their slopes.

Rain-making chemicals are added to super-cooled clouds, i.e., those at altitudes above 18,000 metres, to stimulate the formation of ice crystals in the cloud or cloud cluster.

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Why do vapor bubbles not form in water at room temperature and standard pressure?

we know that water bubbles are formed when external pressure becomes equal to the internal pressure so room temperature is 20 digree to 25 digree and internal pressure deos not equal to external pressure at this temperature so it is clear that vapor bubbles deos not formed in water at room temperature and standard pressure where standard pressure is 760 torr.

Will heating a solid to 200 degrees Celsius cause it to change to a liquid?

It depends on the melting point of the solid. If the melting point is below 200 degrees Celsius, then heating the solid to that temperature will cause it to change to a liquid. If the melting point is above 200 degrees Celsius, the solid will not melt at that temperature.

Does cold weather affect a rubber band?

yes it does because from all the warm,hot,cold,rainy weather it does affect it if there was lighting it would shocked the rubber band to have cracks or marks or it can sometime pull out the rubber band

What is the process that involves water vapor in the atmosphere becoming liquid water?

It is called Condensation. its when warm water vapor hits the cool air and the temperature drops. causing it to convert back to a liquid.

When water vapor condenses on a surface that has a temperature below zero degrees Celsius what happens and what is it called?

When water vapor condenses on a surface that is below zero degrees Celsius, it forms a solid directly without passing through the liquid phase. This process is called deposition, and the solid formed is usually frost or ice.

Why water droplets are formed on surface of gas cylinder?

They condense in the time period because of evaporation, therefore trapping the water vapor inside the glass and when there are enough vapor, like a cloud with rain, the water starts to form droplets and fall downward.

What causes warm air to be less dense?

Warm air is less dense than cold air because the molecules in warm air have higher kinetic energy, causing them to move farther apart from each other. This increased distance between molecules decreases the air's density.

How is ozone created in the upper atmosphere?

Well, ozone (the ozone layer) is created in the Stratosphere. Ozone is created by UV radiation breaking the bonds of an O2 molecule, and then the single O atoms bond with another, unbroken, O2 molecule, and form an 03 molecule, which is ozone.

What are the 3 main group classifications of meteorites?

There are 3 main classifications of meteorites; Stony-iron meteorites, Iron meteorites and Stony meteorites. Stony-iron meteorites are mainly composed of meteoric iron which can be also found in Iron meteorites, Iron meteorites commonly contains iron nickel alloy and the Stony meteorites are the meteorites consists of silicate.

Is steam water vaouper?

Yes, it is. As steam is given of, if you get a plastic bag and place it over the top, you catch water vapour and you will see water droplets inside it.

Why do solid particles of dust need to be present for a cloud to form?

Solid particles of dust serve as nuclei around which water vapor can condense to form cloud droplets. Without these particles, water vapor would have a harder time condensing and forming clouds. Dust particles also provide a surface for water vapor to adhere to, initiating the cloud formation process.

How much water vapor can air hold at 0 c?

At 0 degrees celsius, pressure of 1000 mbar, and 100% relativity humidity, absolute humidity would would be 4.86564 g/m^3

Why is flour a solid?

The particles of the flour and sugar are so small they are like liquid particles and, therefore, flow like liquid.

Why are water droplets and ice crystals heavy but can t stay in the air?

GRAVITY Gravity is pulling on the water droplets and ice crystals just like everything else, so they fall to earth and that is why they can't stay in the air.

Hope I've answered some of your question for you!

Definition of 'pressure nominal'?

Pressure Nominal (PN) is a term used to describe the pressure that a PE Pipe is designed to safely withstand.

A pipe's PN number describes the nominal pressure in bars that a pipe can support with water at 20oC.

The pressure grades available according to European standards are

  • PN 2.5 - max pressure 2.5 bar
  • PN 4 - max pressure 4 bar
  • PN 6 - max pressure 6 bar
  • PN 10 - max pressure 10 bar
  • PN 16 - max pressure 16 bar

To convert bar into MPa use the formula: (PN(bar)/10) = MPa.

Does a liquid gain energy or lose energy as it changes from liquid to gas?

They gain energy. For a solid to become a liquid, energy has to be added so that the molecules can break their bond and move freely past each other. Liquids have a higher kinetic energy than a solid.