I had a physics test the other day on waves/light where one of the questions was on how many maxima a certain double-slit diffraction had. I did the math and then I got that it was: 1 (central maximum) + 2 + 2 + 2 and then I wrote that it was 9. :suicide:
[sp]I'll still get an A though, it was easy.[/sp]
[QUOTE=JohanGS;37821276]I had a physics test the other day on waves/light where one of the questions was on how many maxima a certain double-slit diffraction had. I did the math and then I got that it was: 1 (central maximum) + 2 + 2 + 2 and then I wrote that it was 9. :suicide:
[sp]I'll still get an A though, it was easy.[/sp][/QUOTE]
I did that too, except for counting number of spin states of a particle, and even though all my work was shown, I still got it marked off. :(
[QUOTE=Swebonny;36253872]For a community that seems to love science and yell at any popsci article in the news sections this thread is awfully quiet.
I've been working on my lab report, after it getting denied because of lack of error values and lack of showing how the error calculation equation it is acquired. I have to say that MS Words sucks at writing equations. Gotta fix some Latex editor.
[editline]9th June 2012[/editline]
[url]http://en.wikipedia.org/wiki/Propagation_of_uncertainty[/url]
[editline]9th June 2012[/editline]
You know I thought it would be so much harder than expected.
In the end the error is simply the partial derivative of the constant which was 1/t.
df/dt = -1/t^2
which gives the error of f
df = -dt/t^2 = |dt/t^2|
So now I know the error of the absorption coefficient for lead after getting beamed by some gamma radiation from cesium :)[/QUOTE]
I feel so smart because I now know what a constant is and that f is a function but that's about it
So today in Chemistry class I threw some baking soda into a beaker of boiling water and it started fizzing as though the water were vinegar. I'm pretty sure there was no chemical reaction, but I didn't have time to boil away all the water to check, and the temperature of the water remained the same, so it wasn't due to the boiling point of the water dropping suddenly. I did cool the water and boil it up again and when the water boiled the bubbles didn't just pop and go away, so it looked almost soapy.
I looked up baking soda and boiling water, but only got guides to cleaning drains. Anybody know why the baking soda did that to the water?
It was rural tap water, if that's relevant.
[QUOTE=RobbL;37820884]I don't get why people look for evidence of life in martian rocks on Earth, surely it would all be completely destroyed by the meteor impacts that send the rocks out to space in the first place?[/QUOTE]
They look for fossilized organisms in Martian meteorites.
[editline]27th September 2012[/editline]
[QUOTE=mac338;36312693]Why are quantum physicists so poor at sex? Because when they find the position, they can't find the momentum, and when they have the momentum, they can't find the position.[/QUOTE]
Holy shit haha
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