/sci/ - Science & Math

>>4084290
What are you asking exactly?

Or maybe you can diagonalize them or convert them to row echelon form and quickly check if those simplified forms would lead to non-zero values in C where you would expect 0?

>>4084266
C/B = A?

Or perhaps this is something to do with determinants?

>>4084264
I scored 148 on a DOD administered IQ test (was going to school on a military base) when I was in 4th grade.

I graduated in may with a physics degree, interned at BNL, and I'm going to go to grad school next year.

>ITT: ego masturbation

>>4074029
Congratulations! Your brilliant armchair physics has solved one of the biggest, most exciting problems in physics today!

Somebody give this guy a PHD!

>>4073913
Not stupidity, everyone has to start somewhere.

The second question is easier to answer than the first, so I will start there.

Ice does not float because it is lighter, in fact it is technically incorrect to say that ice is lighter than water. What you mean to say is that it is less dense.

What this means is that if I had a bathtub full of ice and a bathtub full of water, the tub of ice would be lighter, even though the size of both tubs is the same.

When an object is placed in water, it pushes out (displaces) a certain amount of water equal to it's volume. As an example, fill a cup to the brim and stick your hand in it. Now if this displaced water is still in the container, it pushes back on the object. As it turns out, the force with which the water pushes on the object is equal to the weight of the water displaced.

So, go back to that tub of ice. If we dump the it in a large pool, the force on the ice will be equal to the weight of the WATER tub, which we decided was larger than the weight of the ice. Since we have a larger force pushing up, the ice floats.

This is the reason that anything floats in liquid. It is less dense than the liquid.

>>3954934
Do is being are alive?

>>3954926
Are trolls living organisms and reproduce?

>>3954889
Good question, is life a blessing or a curse?

If we weren't alive, we would never have to suffer.

Is a life of suffering better than no life at all?

>>3954131
This thread is delicious, and has my approval.

>>3952389
>>3952389
>>3952389
It absolutely is both, you are correct. Almost all of the matter in the sun is ionized, but occasionally electrons and nuclei do recombine, particularly as you move toward and slightly away from the surface.

>>3952366
>>3952366
Also, emission and absorption spectra are always complimentary, with respect to ionizations.

If you put a "bright" absorption spectrum above a "dark" emission spectrum for the same element, you'll notice that the emissions fill the gaps in the absorption. That's because the same amount of energy emitted by a photon moving to a lower orbital is enough to bring it back up to that same orbital.

>>3952285 pic is related.

>>3952340
>>3952340

It looks like some clarification is in order

An absorption spectrum shows only the lines that are absorbed by a particular compound. For example, if you shine a light at a black wall, you would get a full absorption spectrum.

Emission spectrum show only what is emitted. For example, look at a blue light and you'll see a peak around the blue wavelength.

Things don't "give off" absorption spectra.

>>3952325
>>3952325
Not true. There is a different between thermal emission and ionized emission. You are describing ionization.

A white hot piece of metal is not ionized. These are two different phenomena. You should have learned in class that the two look very different.

A spectrum of thermal radiation does not have gaps, and technically extends to infinity, i.e. even gamma rays are emitted by any body above absolute zero.

Electrons falling back into lower orbitals emit very specific wavelengths, although they do have some slight spread due to things like doppler broadening.

>>3952316
>>3952316
Not true. That is what the emission spectrum of sunlight looks like after it passes through the atmosphere. There is strong absorption in those dark wavelengths.

Notice how empty the other spectra are in OP's picture. Also notice how the hydrogen and helium spectra aline with the dark spots in the sun's spectrum. This would suggest that Helium and Hydrogen are largely responsible for absorbing those wavelengths in the atmosphere.

Actually, now that I think about it it could be that they are actually absorbed before they leave the sun's surface. But I'm not 100% on that.

>>3952308
>>3952308
Actually it's on the thermal radiation page, I was spot on:

>Sunlight is thermal radiation generated by the hot plasma of the Sun.

http://en.wikipedia.org/wiki/Thermal_radiation

>>3952187
I would venture to guess that it's thermal radiation, which emits in all ranges.

Kind of a white hot piece of metal. Would have similar spectrum.

Checking wikipedia to confirm.

>>3849915
No because operators.

Cheating is bad and you should be ashamed.

>>3816804
Lolled at my own temporary idiocy

>>3816781
If you are an agnostic atheist, you're bring all of us down asking stupid questions like this.

>>3816777
One of the most iconic advertisements ever marketed. It was huge for decades. Marlborough cigarettes are to this day associated with the tough cowboy image, and advertisements have been illegal for probably 20 years.

The use of the Marlboro Man campaign had very significant and immediate effects on sales. In 1955 when the Marlboro Man campaign was started, sales were at $5 billion. By 1957, sales were at $20 billion, representing a 300% increase within two years. Philip Morris easily overcame growing health concerns through the Marlboro Man campaign, highlighting the success as well as the tobacco industry’s strong ability to use mass marketing to influence consumers.[9] The immediate success of the Marlboro Man campaign led to heavy imitation. Old Golds adopted the tagline as being a cigarette for “independent thinkers.” Chesterfield depicted cowboy and other masculine occupations to match their tagline of “Men of America” smoke Chesterfields.[10]

http://en.wikipedia.org/wiki/Marlborough_Man

Also interesting, Marlborough cigarettes were originally created for and marketed to women as cleaner filtered cigarettes.

Then this motherfucker happened.

Interesting tidbit

Three men who appeared in Marlboro advertisements - Wayne McLaren, David McLean and Dick Hammer - died of lung cancer, thus earning Marlboro cigarettes, specifically Marlboro Reds, the nickname "Cowboy killers".

I smoke marlborough - you smoke cock.