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Why is the atmospheric pressure lower beneath the mass orf warm air than beneath the mass of cold air?
Warm air is less dense than cold air. Heat is energy, so the warm air molecules are more energetic and move about more, increasing the distance between molecules - thus less dense.
Density is not weight as some have implied. Density is Mass/Volume.
Atmospheric pressure =(density)(accel due to gravity)(height of atmosphere)
The last two terms are constant regardless of temperature of air. Warmer air has less density and thus the pressure due to this air is less.
Alternatively, you could picture two columns of air from the ground to the top of the atmosphere having the same volume. If one has cold air and the other warm, the cold air column, being more dense, will have more mass of air within it since the volume is constant. The greater mass will weigh more due to gravity.
Source(s):Degrees in Physics and Mechanical Engineering
What else can I help you with?
Why is an area of warm air called a low and area of cold air called high?
because the lower you go, the warmer it will get, and the higher you go the colder it will get... example is space is so cold because it is high up, hell, or the core of the earth is so warm because it is the lowest of low.
Why does atmospheric pressure change as you go up in altitude?
Atmospheric pressure decreases with altitude because there are fewer air molecules above, causing less weight of air pushing down from above. This leads to lower pressure as you go higher in altitude.
What causes atmospheric pressure?
Amospheric pressure is caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height.
What type of pressure does cold air have?
Cold air has lower pressure compared to warm air because the molecules in cold air are more tightly packed together, resulting in lower kinetic energy and less force exerted on the surroundings. This lower pressure creates high pressure systems, which tend to bring fair weather and gentle winds.
Does a cold front bring low air pressure?
Pressure depends more on elevation and if there is bad weather/sunny. Bad weather cause the pressure to drop. At the same elevation, cold air is denser/heavier than hot air, how hot air balloons work.
Would you expect higher atmospheric pressure in a hot day or cold day explanation?
On a cold day, you would generally expect higher atmospheric pressure compared to a hot day. Cold air is denser and tends to sink, leading to higher pressure at the surface. In contrast, warm air is less dense and rises, creating lower pressure. Therefore, colder conditions typically correlate with higher atmospheric pressure.
How does warm air mass being pushed into a region of cold air affect atmospheric pressure?
When a warm air mass is forced into a region of cold air, it becomes denser and sinks below the cold air. This creates a zone of high pressure as the cold air is heavier and exerts more pressure on the surface. The movement of air from high pressure to low pressure causes winds to form.
When cold air moves into an area the atmospheric pressure is?
When cold air moves into an area, the atmospheric pressure is high because cold air is denser than warm air. When a cold front moves through an area, the pressure always rises.
What can be expected to occur to the atmospheric pressure prior to the passage of a cold front and after the cold front passes?
Prior to the passage of a cold front, atmospheric pressure tends to decrease steadily as the front approaches. After the cold front passes, the atmospheric pressure typically rises quickly as cooler, denser air moves in behind the front.
How do atmospheric and oceanic circulations transport heat?
Atmospheric- Pressure systems, Oceans- warm and cold currents.
Why is an area of warm air called a low and area of cold air called high?
because the lower you go, the warmer it will get, and the higher you go the colder it will get... example is space is so cold because it is high up, hell, or the core of the earth is so warm because it is the lowest of low.
How is atmospheric pressure affected by Warm air mass pushes into cold air?
When a warm air mass pushes into a cold air mass, the warmer air tends to rise because it is less dense. As the warm air ascends, it creates an area of lower atmospheric pressure at the surface. This can lead to the formation of clouds and precipitation as the rising warm air cools and condenses. Overall, the interaction between warm and cold air masses can significantly influence local weather patterns and atmospheric pressure.
Why does atmospheric pressure change as you go up in altitude?
Atmospheric pressure decreases with altitude because there are fewer air molecules above, causing less weight of air pushing down from above. This leads to lower pressure as you go higher in altitude.
When a cold front displaces an air parcel upwards what will happen to its pressure?
When a cold front displaces an air parcel upwards, the pressure of the air parcel decreases. This occurs because as the parcel rises, it expands due to lower atmospheric pressure at higher altitudes. The decrease in pressure can lead to cooling and condensation, often resulting in cloud formation and precipitation.
What causes atmospheric pressure?
Amospheric pressure is caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height.
How cold does water have to be to freeze in kelvins?
It depends on the pressure. At normal atmospheric pressure, the melting point of water is about 273.15 K.
Why is atmospheric pressure generally lower beneath a mass of warm air than beneath a mass of cold air?
Warm air is less dense than cold air. Heat is energy, so the warm air molecules are more energetic and move about more, increasing the distance between molecules - thus less dense. Density is not weight as some have implied. Density is Mass/Volume. Atmospheric pressure =(density)(accel due to gravity)(height of atmosphere) The last two terms are constant regardless of temperature of air. Warmer air has less density and thus the pressure due to this air is less. Alternatively, you could picture two columns of air from the ground to the top of the atmosphere having the same volume. If one has cold air and the other warm, the cold air column, being more dense, will have more mass of air within it since the volume is constant. The greater mass will weigh more due to gravity.
