Atmosphere Definition and 396 Threads

Homework Statement Derive the pressure, density and temperature profiles of an adiabatically stratified plane-parallel atmosphere under constant gravitational acceleration g. Assume that the atmosphere consists of an ideal gas of mean molecular weight \mu. Given \mu=14u, g = 9.81m/s^2, z =...

Homework Statement The Mass of an Atmosphere: What is the total mass of Earth's atmosphere? You may use the fact that 1 bar is the pressure exerted by about 10,000kg pushing down on a square meter in Earth's gravity. Remember that every square meter of Earth experiences this pressure from the...

How would the whiteness of snow appear if Earth's atmosphere were several times thicker? I think it would appear red as most of the blue frequency light would be scattered before reaching the Earth and the majority of light being reflected of the snow would be red. Am i right?

Hi guys, I recently read some stuff about satellites in space being able to project 3D images on to the sodium layer of our atmosphere about 60 miles above the Earth. Is this possible? Can the sodium layer potentially be used as a giant movie screen for projections? The stuff i read was about...

Homework Statement above each square ince of the Earth's surface is 14.7 pounds of air. the density of air at sea level is 1.27g/l. the Earth is 7930 miles in diameter and has a mass of 5.98x10^24kg. use this data to determine the mass in kg of the Earth's atmosphere determine the...

My ten year old asked the following question - why doesn't gravity pull the atmosphere all the way down to the surface of the earth?

If I am in free-fall towards Earth or in this case let's use a planet with no atmosphere to get rid of air drag. So I am in free-fall and then I throw a ball up above me. From my point of view the ball would appear to keep going away from me until i hit the ground. Is this correct?

Homework Statement Calculate the total atmospheric mass between 25S and 25N, between the pressure levels 300mb and 200mb. Assume the Earth is a perfect sphere.Homework Equations Radius of the Earth = 6378km 1 degree latitude = 111km volume of cylinder = pi*r^2*h The Attempt at a Solution I...

Homework Statement Calculate the pressure of the atmosphere (with approximately plane parallel slab ge- ometry) as a function of height z above the ground. Assume the gas in the atmosphere has constant temperature T and that the equation of state is that of an ideal gas, namely...

I've read that our atmosphere contains roughly 1% of our global water. I was wondering what, if anything except increased temperatures, could cause the atmosphere to hold more water than that (maybe even considerably more). Any kinda of idea would be great, even ideas that would involve massive...

Earth's atmosphere at sea level has the same velocity as Earth's solid surface: 465metres/sec. What about at higher heights? E.g. what's the velocity of the (particles of) exosphere?

Hi Guys .. I have a question and I hope I get a good and obvious answer PLZ .. How do stars and moon look like from outside the Earth's atmosphere ? If we went out of the atmosphere of the Earth , will we see the stars in the same way as we see them from .. here ? In other words do the...

I know I know this isn't really related to molecular biology, but I figured since Biologists have a strong background in ecology in most cases, I'd be able to get more help here than the Earth forums (especially because biologists know a lot of chemistry). Basically I understand that CO2 keeps...

Does the Earth's atmosphere match the angular speed of the Earth (i.e. is it stationary with respect to the Earth's surface, or is it "sliding" over the Earth's surface)? I'm trying to understand if the Coriolis effect that is creating the spiral pattern present in hurricane would be the same...

Can we make a car or vehicle that can ride on the Earth's magnetic field here within the Earth's atmosphere?

When a meteoroid enters the atmosphere and becomes a meteor, it burns due to great fraction between the rock and and the air. But how scientists calculate the exact amount of kinetic energy converted to heat due to fricton and how much of this is used to heat up the rock and how much of it is...

So I have a quick question about something I'm a bit confused on. I was under the impression that, unlike liquids, gasses become more saturated in COLDER temperatures, rather than warmer. My geology teacher told us that the WARMER it is in the atmosphere the easier it is for water vapor to...

How much carbon dioxide has Eyjafjallajokull pumped into the atmosphere during the present eruption, compared to the amount not pumped in by aircraft during the recent "no fly" period in Europe?

My biology teacher asserted to our class that compared to the vastness of the atmosphere of our earth, the amount of harmful gasses we are emitting is a fraction of a percent and therefore can be dismissed as harmless, and instead we should be worrying about more fragile ecosystems down here on...

Homework Statement Your eardrum has an area of about 53 mm2. Sounds become painful to your ear when the pressure variations that are involved in sound reach 200 Pa above and below normal air pressure. At this level, called the threshold of pain, how much force is exerted on your eardrum...

we define the ATM. pressure as the weight of cylinder of air above the Earth with surface area for its base equal 1 m2 referring to this definition how could we illustrate the pressure at 1- a room with roof . 2- a room without roof . 3- vacuum room.

hello, how come moon is too small to hold any atmosphere and titan has so much atmosphere?

Help Asap :( Hi I was wondering if anyone could explain this question to me in more simple terms? And what I need to look for? It's confused me :( You are required to summarise the main energy transfer mechanisms within the Earth’s atmosphere, and most importantly to describe the effects of...

I was doing some research today and realized a somewhat silly fact. It appears that Earth's atmosphere actually lowers the total amount of radiation Earth's surface absorbs, even though it raises the mean temperature. This should not sound impossible, the atmosphere provides [by re-radiation]...

Homework Statement In the atmosphere and at an altitude of 250 m, you measure the electric field to be 150 N/C directed downward, and you measure the electric field to be 170N/C directed downward at an altitude of 400 m. Calculate the volume charge density of the atmosphere in the region...

1. Homework Statement Consider a one layer atmosphere for the planet Venus. 19% of incoming solar radiation is absorbed by the atmosphere. 99% of the outgoing radiation is absorbed by the atmosphere. The incoming radiation, E, as measured by satellite is 615 Wm-2. 1) Derive two equations...

Homework Statement What is the total mass of the Earth's atmosphere? The radius of the Earth is 6.4 x 10^6 m, and 1 ATM = 10^5 N/m^2 Homework Equations F=PA=ma The Attempt at a Solution F_{g}=P_{atm}A_{earth}=m_{atm}g m_{atm}=\frac{P_{atm}A_{earth}}{g}=\frac{P_{atm}\pi...

Re: the absorption & re-emission of long-wave radiation in the Earth's atmosphere. I thought it all made sense until I was trying to work out how to explain it better to others! So the Beer-Lambert equation describes the absorption at a given wavelength as exp(-k.z) where k is a constant...

1. Show that the variation of pressure with altitude for a planetary atmosphere (assuming constant temperature) is more accurately given by: p = poek(1/r-1/R), where g is taken to vary as 1/r2 (with r being the distance from the centre of the planet), po is the pressure at the surface, R is the...

Homework Statement here is Earth and here is atmosphere. Why this atmosphere is going around with Earth when it is going around, not stay in one place static? i mean not this motion around sun but this motion which is making day and night, the air and everything else is going around with about...

Hello everyone and happy new year! I'll make it quick. Supposing that we could somehow visit the early Earth, could we see the stars or the Sun? Was the atmosphere ever so dense and full of gases that would hide the light of the stars? Thanks in advance.

Hi all, Does anyone know of a reliable tabulation of the opacity of the Earth's atmosphere (for example at zenith distance zero) as a function of wavelength from 100nm to 1 micron? Obviously the opacity varies with different conditions but something like a US Standard Atmosphere model would...

I understand that liquid water cannot exists on Mars for extended periods of time because: a) The atmosphere is too thin b) Resulting in a lower boiling point water c) Which leads to sublimification of solid ice into gaseous vapour Quite specifically, I would like to understand the...

Homework Statement In 1988 telescopes viewed Pluto as it crossed in front of a distant star. As the star emerged from behind the planet, light from the star was slightly dimmed as it went through Pluto's atmosphere. The observations indicated that the atmospheric density at a height of 50 km...

To heat water to 101 degrees C at 1 atmosphere? Is there any case when this is possible? Even off the wall lab stuff will suffice. What if water isn't completely pure, like most tap water here in the states? My teacher says it isn't possible but any caveat to prove him wrong would be...

Is it possible? As far as I know you'd need energy from a star nucleus greater than the suns to cause any change in the atmosphere, creating heavier gasses right? Could the amount of oxygen in the air going above 30% have any impact other than fires burning longer, or any human combustion...

i want to launch the can size satellite and do some experiment about radiation and frequency.so, how to scan the frequency at atmosphere by using PIC?

Hi All, Been try at this for a week now and I know I'm missing something. I'm too far out of university to remember how to do it, but just close enough to know that I should remember. Anyway, I have a steel can containing a mixture of liquidfied hydrocarbon gasses...

Hello, I am hoping someone on here can help me find a source for a science question I have. How much power enters the Earth's atmosphere from the Earth itself [Geothermal power]? I was reading a discussion on another website, where someone was asking about the Global Warming effect of...

Homework Statement given: atmospheric pressure near the Earth's surfact=100kPa density of the air near the Earth's surfact=1.3kg/m-3 radius of the earth=6400km the best estimate for the total mass of the Earth's atmosphere: 5x1018 kg. how to work out this value?? Homework...

Suppose we set off a nuclear weapon 400 km above the surface of the Earth. See: http://en.wikipedia.org/wiki/Starfish_Prime When the x-rays hit the atmosphere what gets the greatest velocity boost, electrons or ions? Can we assume the averaged velocity of all boosted particles is in...

Can a spy satellite see a person through a vertical window, i.e., with line of sight near the horizon?

Can H2O form without an atmosphere?

Ozone (O3) has a higher molecular weight than regular O2 gas. According to Gay-Lussacs law, O2[SUB]and O3 should occupy the same volume, and therefore O[SUB]3 will have a higher density. Higher densities sink, so why does ozone stay so high in the atmosphere?

I have a silly question: what do people understand by "the atmosphere of a gas giant" ? Isn't most of the planet "all atmosphere", or how should one picture this ?

Hi, just wondering about a (probably) easy queation. Was learning about the coriolis effect today and how since the atmosphere is not rigidly connected to the Earth it appears to veer off a northerly/southerly course in a direction depending what hemisphere it occurs in... etc. Basically its...

Power of atmosphere and skyscraper windows? Hi i was wondering about a question dealing with atmosphere and windows...If you could help me out by understanding somethings id really appreciate it..thanks alot... In a large cities when wind is forced to blow between two rows of skyscrapers...

Disclaimer: English is not my native language. I'll try to do my best, but i could put some inappropriate term somewhere, if so please forgive me and feel free to correct me, the more i learn the best :P Hello guys. I'm new here, but i don't really think that this post could be addressed to...

Homework Statement At ground level in Colorado Springs, Colorado, the atmospheric pressure and temperature are 83.2 kPa and 25 C. Calculate the pressure on Pike’s Peak at an elevation of 2690 m above the city assuming an adiabatic atmosphere. Known Patm = 83200 Pa T0 = 25° C z-z0 = 2690 m...

When or if an object exceeds the speed of light what will the reaction be a) in our atmosphere, b) in space? Thank you in advance Tom F