Because the cold air come and get hot air?

Cold air sinks and warm air rises. Why? Discuss!

Many of us experience the effects of the fall hot air rises and cold air on a regular basis. It happens all the time in the air above and around us, and is one of the components of our weather systems. You may find that when there is no heating or air conditioning system at home, the upstairs rooms are a bit 'warmer than downstairs. Another example is the heat> Balloon this principle works the same way about this. By heating the air inside the balloon, the craft will be lighter than the surrounding air and rises. This is actually the result of cold air rushing down the ball at the same time which increases.

Air

So why the cold air? This is simple: it is heavier than warm air difficult. And why? This is a little 'less easy, but only slightly. As with all the air of gas (A generic term for a mixture of gases in the atmosphere), contains molecules that move (or move). This movement (or agitation) is greater than the temperature rises. The molecules move in paths ever larger, occupying more space. This is the air mass to expand. Although the total mass of a lump of mass has not changed the air spread, more and thus any cubic field will be easier. An analogy is with popcorn. A pound of popcorn firstthat seem to fit in a cup. After popping, gave the same grain fill a large pot. His total weight will weigh more or less the same as a pound, which has always been, but if you filled the cup with the original popcorn, unpopped corn would be less than like the rest, would not fit into the cup. The expansion of hot air is similar. A cup of cold air would weigh more than a cup of warm air.

Since the game because we want to continue. Whymolecules move more when it gets warmer? They absorb energy from electromagnetic waves that crashed into the molecules. In short, this energy is transferred by radiation. So we have a collection (several billion, for example) of molecules that are very excited and a further collection, much less excited. The collection is developed and so excited light. The collection, which are less enthusiastic is heavier. The more heavy stuff coming down like a "light increases.

Asas the key process behind hot air balloons, air movement, according to its temperature is a factor, time. Meteorologists must ensure that these movements are taken into account in its modeling of weather systems to produce decent. Airconditioning
And the designers should consider these factors, how should architects. To preserve the valuable heat through the hot air must be prevented from escapingRoof of a building. Just as heat, cold air movement under conservation systems must comply with the design of cooling and refrigeration.

If you have a few minutes, try this experiment. First make sure that nothing has been found in the refrigerator for at least 2 hours. So leave a thermometer in the refrigerator should be placed on the bottom and then close the door. After 10 minutes of opening the door and immediately take note of the display tothe thermometer. Then put the thermometer on the top shelf and close the door. After 10 minutes take the reading as soon as you open the door. You will notice the difference - perhaps the most 1 to 2 degrees. This may not be a big problem for us at home most of the time. For kitchens, but this difference can be critical to ensuring food security at an optimal temperature is maintained. commercial refrigerators are often equipped with a ventilator, which compensates for the warmer air and coldnegates the tendency of cold air to come down and get warm air.

If you saved a large freezer - those who hold shares of thousands of boxes - the movement of air around the plant is an extremely important factor. The fans that blow cold air in the store is always near the ceiling, allowing them to spread downwards. Finally, of course, the goods stored in the freezer must be removed and moved to another location,usually loaded onto a truck. If the frozen assets frozen on a truck, it loads without problems. Occasionally, however, only a small amount of frozen goods are needed and the use of a large truck, the temperature set at a temperature of frozen would be a waste if only some boxes have been sent. Here pallet shrouds isolated or roll cage covers come into play. These include the pallet or roll cage, to protect property frozen for up to 8 hours in a(They also protect environmental assets, such as cakes and bananas in a chilled or frozen). If a roll-cage is used, the insulated lid works best if the roll cage is full of products. If it is half full, then - you guessed it - the cold air falls down. This is fine at first (provided that the goods in the lower half), but after a while 'hot air that has risen high on the whole, to begin affecting the upper layer of goods. Here, aTemperature divider block to be used to make a seal and protect
the product in the roll cage half full.

Now you know why and how of cold air and warm, and now you know why the cold feet in winter!

Because the cold air come and get hot air?