The collision coalescence process is the process of cloud droplets increasing in size by colliding and coalescing. When droplets bump into each other, it is called collision, and when they stick together, it is called coalescence.Continue Reading
Cloud droplets must increase in size about a million times in order to become raindrops. Raindrops are formed in warm clouds exclusively by the collision coalescence process. However, this process has little importance in clouds where temperatures are below freezing.
Droplets can only coalesce or combine if they have an opposite electrical charge; otherwise, they simply bounce off one another. As the droplets grow larger and heavier, they begin to fall through the cloud. Larger drops fall faster and collect the smaller drops as they fall, causing the droplets to grow even larger.
Clouds with temperatures below freezing use the Bergeron process to increase the size of droplets. This process was first proposed by Tor Bergeron in the early 1920s. In this process, ice crystals form high in the clouds and increase in size by attracting water vapor. As the ice crystals become large enough to fall towards the Earth's surface, they pass through the lower, warmer portion of the cloud and grow even larger.Learn more about Weather & Tides
The ideal temperature is the temperature range in which the human body is thought to be most efficient and comfortable. It lies between the range of 20 to 26 degrees Celsius or 68 to 79 degrees Fahrenheit; however, it is generally believed it is 25 degrees Celsius (73 degrees Fahrenheit).Full Answer >
The reason your windows become steamed up or foggy is that water droplets condense out of the air onto the glass. The moisture in the air is not attracted to the glass specifically; rather, the moisture condenses on the coolest surfaces in the area. The windows are usually the coldest surface in a residential home or office building.Full Answer >
Wind is the flow of air above the surface of the Earth in an approximate horizontal direction. Wind is named according to the direction it comes from, so a west wind blows from the west to the east.Full Answer >
Given the same temperature and pressure, humid air rises compared to dry air. As the humidity increases, so does the tendency of air to rise.Full Answer >