UPSB v3
Off-topic / Homework help thread
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Date: Sun, Feb 21 2010 20:36:40
anyways i've notice how there's some threads that ask for help on equations, projects, and homework in general. so i made this thread so there wouldn't so much threads. So i'll start this off i need help on project that ask for the definition of nuclear energy of nuclear fission and fussion with a picture and an explanation why i drew this. Please help D':
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Date: Sun, Feb 21 2010 20:40:08
uhm.... use the internet to find the definitions and draw pictures such as nuclear power plants, molecules splitting etc?
like for nuclear fission do
and so on -
Date: Sun, Feb 21 2010 20:41:44
>_> no i need a picture of an example such as for mechanicle energy i drew a boy running.
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Date: Sun, Feb 21 2010 20:43:14
that is an example of nuclear fission D:
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Date: Sun, Feb 21 2010 20:44:51
Is warrentless wiretapping justified to protect national security?
Discuss. -
Date: Sun, Feb 21 2010 20:49:24
apgov02.wikispaces.com/file/view/wiretapping%5B1%5D.ppt
It's got useful information D: -
Date: Sun, Feb 21 2010 20:49:25
It's for stalkers who work for the government.
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Date: Sun, Feb 21 2010 21:09:53QUOTE (Ohayo @ Feb 21 2010, 03:41 PM) <{POST_SNAPBACK}>>_> no i need a picture of an example such as for mechanicle energy i drew a boy running.
A diagram of a mechanical system that shows potential energy and kinetic energy. Maybe a catapult or a pulley system. Or even someone at the top of a building about to drop a ball. -
Date: Sun, Feb 21 2010 21:15:00
Why should we protect turtles from becoming extinct?
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Date: Mon, Feb 22 2010 02:12:14QUOTE (Loanshark @ Feb 21 2010, 12:44 PM) <{POST_SNAPBACK}>Is warrentless wiretapping justified to protect national security?
Discuss.
Bull.
Wiretapping doesnt do much, imo. Theres no proof or anything, plus with audio editors out there, everything can be edited. -
Date: Mon, Feb 22 2010 06:23:36QUOTE (Colin @ Feb 21 2010, 09:12 PM) <{POST_SNAPBACK}>Bull.
Wiretapping doesnt do much, imo. Theres no proof or anything, plus with audio editors out there, everything can be edited.
You can't edit your words over a live phone call. -
Date: Mon, Feb 22 2010 06:27:15QUOTE (Colin @ Feb 21 2010, 07:12 PM) <{POST_SNAPBACK}>Bull.
Wiretapping doesnt do much, imo. Theres no proof or anything, plus with audio editors out there, everything can be edited.
im pretty sure they can tell if its edited or not.......
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Date: Mon, Feb 22 2010 06:32:20QUOTE (Prince @ Feb 21 2010, 04:15 PM) <{POST_SNAPBACK}>Why should we protect turtles from becoming extinct?
Because turtles play a huge role in the economy. Turtles are a pet that alot of kids get. So there fore you get money from selling the turtles, which help the economy. But if they went exstinct then the economy would drop -
Date: Mon, Feb 22 2010 06:34:08QUOTE (spinneraddiction @ Feb 22 2010, 01:32 AM) <{POST_SNAPBACK}>Because turtles play a huge role in the economy. Turtles are a pet that alot of kids get. So there fore you get money from selling the turtles, which help the economy. But if they went exstinct then the economy would drop
Oh yes, because pet turtles are that huge in demand!
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Date: Mon, Feb 22 2010 06:41:52QUOTE (Loanshark @ Feb 22 2010, 01:34 AM) <{POST_SNAPBACK}>Oh yes, because pet turtles are that huge in demand!
well, when you put in to how many kids there are and how many kids like turtles then that could change the economy
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Date: Mon, Feb 22 2010 06:42:13
because people dont want things to go extinct in general.
they want to preserve whatever they have
its just human nature -
Date: Sun, Mar 14 2010 09:00:47
Can anyone do this without L'Hospital's Rule?
Evaluate:
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Date: Thu, May 20 2010 20:34:46
Need help with a basic Physics equation. D:
(This is my first post in a long time, due to struggles with my family and school.)
"Light approaches an unknown material at 40(Degrees.) in air. The angle in the material is measured at 28(Degrees.) Find the Index of Refraction."
On the sheet the answer is (1.37) but I can't figure out how to get the number. -
Date: Thu, May 20 2010 21:08:57
sin(40°)/sin(28°) = 1,37 (or = n/n(air) with n(air)=1)
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Date: Thu, May 20 2010 22:26:16
Thank you.
Now, I have another problem. D:
"Using snells law (Sin i/sin r = N) determine :
The angel of incidence in air for a ray whose angle of refraction is 30(Degrees.), in a medium of refractive index 1.40"
(44.4 Degree's.)
How do I get this one? D: (Doing a physics worksheet, I'm just posting questions I need help with. Thanks guys / girls ) ^^
I need help with yet another one. D:
"A ray of light enters a transparent medium at an angle of incidence of zero. What is the angle of refraction?" -
Date: Wed, Jun 16 2010 21:07:04
Show that this approximation works.
Further infos:
j>>s
ln(1+X)=X for |X|<<1
Stirling approximation: ln(X!)=X*ln(X)-X -
Date: Wed, Jun 16 2010 21:28:47
what do you mean works, whats the error threshold
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Date: Wed, Jun 16 2010 21:48:30
"Show the validity of this approximation" That's all it says. Plus the hint to use the two approximations I mentioned.
This is not for math but for physical chemistry. They don't care as long as the results are not wrong by orders of magnitude
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Date: Thu, Jun 17 2010 14:37:49
@Elias:
First one:
sin i / sin30 = 1.40
sin30 * 1.40 = sin i
i = sin-1 (sin30 * 1.40)
Should get you 44.4.
Second one: Can't remember, did this like 2-3 years ago. I think it goes right through, with 0 angle of refraction since angle is measured from the normal if i remember correctly. -
Date: Fri, Jun 18 2010 05:03:00
im taking chemistry and its confusing as fuuuuck. how would i combine NH+(4) and Cl-
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Date: Fri, Jun 18 2010 05:06:03
NH4Cl