Recent content by justinbaker

ok so what am i doing wrong here? this was the only question i missed on my exam, and its driving me crazy...

well trying to help my little brother with some chem homework, and i believe i am just thinking too hard about this question anyways its a whole chem lab thingy about the composition of pennies and one of the thinking questions is now when it says "identity" I am assuming they are...

ok so i am still really confused here, so is the avg magnetization zero?

So I am studying for finals and this is on the set of questions that our teacher told us to review. http://imageserver4.textamerica.com/user.images.x/98/IMG_372198/_0509/T520060509170033508.jpg so not even quite sure how to attack this one, so any help would be great, thanks

Studying for finals and this is one of the reveiw questions our teacher wanted us to take a look at. A little help please, i got started somewhat as you will see below "Suppose that we have a lot of noninteracting atoms (a gas) in an external magnetic field. You may take as given the fact that...

solved thanks for the help, i just solved it and did not have time to update the thread. Please help me, i don't even know where to begin. "Earths atmosphere is made up of a ratio of nitrogen to oxygen. The ratio is 78:21. Assumming constant temp, what is the ratio at 10km. Explain...

but how do i get from the alpha x sigma x T^4 equation to the equation I = Ie(de/d)^2?

no it does not give a value for alpha, everything in the problem is in my orginal post. i am still lost on the other ones as well

can anyone help me?

for a.) i know i need to solve for T. so is the radiated heat flux the same as incident energy flux Ie? If so then how do i solve for alpha, in the equation total pwr absorbed = pi x R^2 x alpha x I

The Sun emits energy at a rate of about 3.9 · 1026W. At Earth, this sunshine gives an incident energy flux Ie of about 1.4kWm−2. In this problem, you’ll investigate whether any other planets in our solar systemcould support the sort of water-based life we find on Earth. Consider a planet...

ohh i see now, but the default search thingy for firefox sucks, is this possible with the google extension in firefox?

i copied them to the folder, but nothing has changed, and i have restarted firefox

nvr mind i got it

can anyone else help with the 1st one?