Atmosphere Definition and 396 Threads

If Mars used to have a denser atmosphere in the past, could Earth have had one as well?

a) Show that the escape speed for a particle to leave the gravitational infuence of a planet is given by (2GM/R)^1/2, where M is the mass of the planet, R is its radius, and G is the gravitational constant. b) The temperature near the top of Jupiter's multicolored cloud layer is about 140K. The...

Here is my theory: Once heat radiation enters our atmosphere from the sun and gets absorbed by the material inside, it is emmitted back as conduction/convection. In order for this heat to travel it needs a medium such as air. Now isn't it true that once this heat reaches the border between...

Here's the problem: We are ascending in an elevator at sea level. Our eardrums feel a 1 percent decrease in pressure per minute. Calculate the upward speed of the elevator. My solution: *I am using the equation p1/p0 = (T1/T0)^(-g/aR), where p1 and p0 are pressure at point 1 and point 0...

once i looked at short video clip of Jupiter atmosphere. i have questions in mind: 1. why the atmosphere seems to travel at different speed making up a number of sliding rings?why don't they travel together? 2. what makes the pattern of turbulence so huge? i think we need such an incredible...

In lecture 9 of the second volume of the Feynman Lectures on physics, it is written... How can we measure [the field in the air above the ground] if the field is changed by putting something there? There are several ways. One way is to place an insulated conductor at some distance above the...

Hi there. I have two questions to make. First how do you imagine to be Pluto's surface, climate and atmosphere? And second how much time does the sun light to reach Pluto? Please answer, i really want to know about these two things. Thank you.

I am a science fiction writer and I need some help with developing a plausible alien species. The species has to end up technologically advanced. What would be the effect on a species that evolved on a world with 74% nitrogen and 25% oxygen (other gases remaining similar to Earth)? Thanks for...

Our atmosphere is continously being heated and energized by the sun. Has anyone ever actually developed an engine able to take this energy directly from the atmosphere or if not, why nobody was able yet to make one?

I'm reading in my physics book that: "A rule of thumb used by astrohysicists is that a gas will escape from a planet's atmosphere in 10^8 years if the average speed of its molecules is 1/6th of the escape velocity." they said this statement without any derivatins and I was windering why...

good day to everyone, i wish to ask what chemical in our environment asorb some energy from sun? and what it has to do with high C02 level in the atmosphere? thanks in advance

(a) If galactic cosmic rays produce 75 gm of ^{14} C per year in Earth’s atmosphere, the ^{14} C [/itex] resides in the atmosphere as 14CO2 and the radioactive decay half life of ^{14} C is 5730 years, calculate the total mass of ^{14} CO2 in the atmosphere. ok the half life equation is...

If you find a way to acctually travel (defining gravity of course) slowly like 20 MPH as you enter the Earth's atmosphere from space would you burn up? Is burning up just an effect because of the speed ships are coming in? Or, even if you were traveling at 10 MPH through the atmosphere would the...

Does a planet's atmosphere effect how hot objects get when entering its atmosphere? If we had two exact space shuttles entering two different planets, the first planet is Earth while the other is significantly smaller planet but its atmosphere is predominately made of carbon dioxide. Both are...

Astronauts on the Moon can jump so high because 1) they weigh less there than they do on Earth. 2) their mass is less there than it is on Earth 3) there is no atmosphere on the Moon I believe the correct answer is 1, because they weigh less. Choice 2 has got to be wrong since mass...

I was reading that helium does not accummulate in the Earth's atmosphere due to the fact (a claim) that it is too light to be retained by gravity and diffuses out into space. Does anyone know the physics that prevent the atmosphere seeking the vacuum at whooshing out into space. Is there a...

What is the mass of the Earth's atmosphere? The radius of the Earth is 6.4E6m. The only thing I can think of is to subtract something from the mass of the entire Earth or something...

what will be the colour appearance of the sea on earth?

All right, you're going to have to really humor me here. As far as I know, the only kind of 'cold' fusion that has ever been demonstrated to work is muon-catalyzed. The reason it isn't viable is that is takes so much energy in the first place to create muons and they have a very short...

Is there any damaging effect or chemical that gets released into our atmosphere? I know wildfire and deforestation is a problem, but what else? Also, sorry if I post on wrong place, I was stuck in between Chemistry, and Biology. =/

How much does the Earths Atmosphere weigh? Also let us know how to calculate that.

I am searching for graphs to answer te following questions but I cannot find it on the internet. What is the temperature, density ,and pressure of the atmosphere as altitude changes? What is the temperature of the thermosphere at night?

Hi. Can someone give me a hint to how to calculate total mass of nitrogen in the atmosphere. I've calculated the mass of all the atmosphere, I got the percent by volume of nitrogen to be 78.03 %. I converted the mass of the atmosphere to Liters. I got the volume of nitrogen to be 3.18e21 L and...

Should we create artificial frictional medium such as atmosphere ?

I watched a program on some public broadcast channel where a professor from a university detailed the possible ends of the earth. One of them (from what I recall) had to do with lowering CO2 levels in the distant future. The lack of CO2 would eventually kill off all plant life. I tried...

HallsofIvy wrote in another thread: Just yesterday I was asking myself that very same question. So thanks for giving such a nice an simple explanation. I was also wondering why the atmosphere revolves with the earth; something you stated but didn't explained. Is it something that goes...

If the moon ever did enter our atmosphere, what would be the first thing that would happen? How would the two gravitational fields interact with each other?

how can i calculate the fractional abundance of HI, HII, H- and e- for hydrogen in the photosphere (T=5770K) and density 10^17?

Hello all, I have a relative simple question, but I'd like to double check with you folks. Typically, in normal atmosphere the kinetic energy of water molecules in water, should be lower than the kinetic energy of water molecule in hot vapor, isn't that right? Thank you! /cheers!

when cooling a solution, if the container is open, is it possible that some water from the atmosphere can be absorbed into the solution? and if so, can there be a significant amount of absorbance (i.e enough to alter some properties of the solution) ? I'm trying to explain some results i got...

anyone know how much xenon is in our atmosphere? This is where we get it right?

Hi, can someone tell me the extinction coefficient of a gamma ray in the atmosphere? How far does a gamma beam go in the atmosphere before its intensity reduces to half or to 1/e?

Awesome web site, but its mostly over my head... with my physics expirence limited to high school. I have always wondered this... if space is a vacuum... and gasses in a vacuum tend to ... uh... for a lack of a vocabulary... de-concentrate... disperse... what causes Earth's gases to stay...

Would you please tell me what is in there ? I mean what substances are existing ? Where can i find out some information about this ? Thank you very much,

I was unsure of where to post this so that it would get attention. I am preparing a short lecutre about the Earth's atmosphere and I need to know the following(which I have not found answers to elsewhere): How would be experience standing on Earth without an atmosphere? Would we be totally...

can someone tell me how i can calculate what the weight of a 100lb man (on the surface of the Earth) would be on different parts of the Earth: the core and at all the layers of the atmosphere thanks

If the Earth did not have an atmosphere could you make a golf ball orbit the Earth just 1 foot above the highest point of the crust of the Earth?

Hey I was just wondering if you know the height of the atmosphere, and the pressure that atmosphere creates on the Earth (1 atmosphere), then how would you approach calculating the number of molecules in the atmosphere? I was thinking of using the PV=NKT formula, where K is boltzmann's...

A barometer having a cross-sectional area of 1.00 cm^2 at sea level measures a pressure of 76.0 cm of mercury. The pressure exerted by this column of mercury is equal to the pressure exerted by all the air on 1 cm^2 of Earth's surface. Given that the density of mercury is 13.6 g/mL and the...

Let's assume for the moment that beyond any doubt, global warming is real. Does this offer a viable solution to reduce global warming? Could this create another environmental disaster by loading the biosphere with aluminum oxide [apparently the preferred choice to be used in jet fuel]. The...

1) What is the mass of a column of air that has a cross-sectional area of 1 square centimeter and that extends from sea level to the top of the atmosphere? What is the weight of this air column? What is the pressure at the bottom of this column? 2) Is the value for atmosphere pressure...

I need every help I can get! I need to know all about the layers in the atmosphere and the function and structure of ozon including cimate issues. To be more specific about the layers, I need to know what they consist of, where they have their names from and why, temperature and what...

The surface of Mars, the loss it’s of atmosphere and the fate of earth. I think that what we would expect on Earth (the potential of the Earth's electro-magneto-dynamic) is not on Mars. We will not find a molten core, nor a strong atmosphere. The rotational speed of Mars is adequate but the...

i know that other planets in our solar system have lightning storms and as far as i know its natures way of keeping the electric field between ground and atmosphere in balance, but what would happen if this system had a "glitch" and an imbalance occured, could the atmosphere discharge into...

http://news.nationalgeographic.com/news/2003/06/0625_030625_atmospherethunder.html

There may be a topic on this already (in which case I'll lock tjis topic), but did any of you watch the French Open match between Williams and Henin-Hardenne? The crowd was really heckling Williams after Williams questioned two of the judge's calls. The predominately French crowd cheered...