Sentences with phrase «warm air rises because»

Warm air rises because it is less dense — it is all to do with kinetic energy.

We all learn in school that warm air rises because it is less dense.

Not exact matches

In 2011 Stanford University researchers found that white roofs would provide some local cooling but at the expense of more global warming, largely because such cooling means less hot air rising and therefore fewer clouds forming.

First as the temperature gradient in the atmosphere increases, at a certain point the atmosphere becomes unstable (because rising (falling) packets of air do not cool (warm) fast enough by expansion (compression) to stop rising (falling)-RRB-.

Because contraction of the vortex tends to require faster rotation (conservation of angular momentum), which increases centrifugal acceleration, which opposes contraction, it becomes hard for air to flow in sideways to take the space of warmer air that is rising when the air is spinning; thus, a rising column of air can pull up on air from below.

15 Heat Transport in the Biosphere The unequal heating of Earth's surface drives winds and ocean currents transport heat throughout the biosphere Winds form because warm air tends to rise and cool air tends to sink air that is heated near the equator rises

The air cools because there are no clouds to block the rising warm air and there little water vapor to absorb the OLR.

As you say, convection uses up a lot of energy too and also counters the idea of radiative heat transfer as a big ticket item because «hot» CO2 molecules only remain so for a brief fraction of a second before they collide with N2 or O2 to warm that localised parcel of air; which then rises to attain equilibrium T somewhere higher and at a COLDER temp so no rad Transf!!!

More clouds both drastically reduce energy input from the sun and simply slow release of what energy there is trapped in the lower troposphere, but the long term effect would be a fall in average temperature because of the significantly reduced input power but the atmosphere's ability to cool is aided by air current circulation whereby the warmer air rises above those low clouds and that infra - red is more easily re-emitted into space, whereby the low clouds now block that re-emission from hitting the ground again to any significant degree.

As the CO2 and CH4 (methane) level goes up, H2O vapour in the atmosphere falls which — because H2O is 30 times more important than CO2 as a «greenhouse gas» offsets the effect of CO2 on temperature, while cloud cover and albedo increases because warmed moist air rises to form clouds, further cooling the world.

Hurricanes only work because the rising air is warmer than the environment, even if only one or two degrees.

Since a sustainable future based on the continued extraction of coal, oil and gas in the «business - as - usual mode» will not be possible because of both resource depletion and environmental damages (as caused, e.g., by dangerous sea level rise) we urge our societies to -LSB-...] Reduce the concentrations of warming air pollutants (dark soot, methane, lower atmosphere ozone, and hydrofluorocarbons) by as much as 50 % [and] cut the climate forcers that have short atmospheric lifetimes.

Air containing water in vapour form will rise higher than dry air because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaAir containing water in vapour form will rise higher than dry air because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaair because it is lighter so when the vapour is removed it must fall back to its «correct» height but because of the air around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surfaair around it becoming warmer as it descends it will remain too dense for its height until it reaches the ground and receives more energy from the irradiated surface.

Or I could argue that the last two thirds show the natural rise, and the early temperatures are warmer because the air was cleaner back then.

This process may because by a warm surface; the air near the surface being forced to rise over higher ground or instability within a weather front.

First, the air in the earth's atmosphere is warmest around the equator (because the sun reaches the earth at a direct 90 ° angle) so that warmer air rises and flows north and south of the equator.

The molecule will first use the heat energy in expansion and on cooling will again condense and sink because heavier, and it will cool when its heat expanded volume flows to colder air which absorbs the heat, the internal kinetic energy of vibration, which if strong enough will pass that heat to another colder (which is why visible light is not a thermal energy, it is not powerful enough to move a molecule of matter into vibration, it takes the bigger heat wave, longwave infrared, aka thermal infrared called that because it is the wavelength of heat)-- that is how convective heating warms the fluid gas air in a room, by circulation, in the rise and fall of molecules as they expand and condense, not by heat energy propelling molecules to hit other molecules..

There's an objection you haven't addressed yet — that if extra heat tried to build up near the surface, convection would immediately carry it away again because warm air rises.

For a study explaining tthat greenhouses are kept warm less by the radiation properties of glass than because the heated air can not rise and blow away see Wood (1909); for the science, see also Lee (1973); Lee (1974).

Because the heaters allow warm air to rise up through the room, you can install the baseboard heater under a window to prevent cold drafts from infiltrating your home.