Science & Mathematics - 13 November 2007

I am given a torque vs. time graph which starts at (0,0), increases linearly to (4,0.2), then down to (10,-0.1), then back up to (12,0). The question is, a 12-cm-diameter, 4cm-thick, 2.0 kg disk, which is initally at rest, experiences the net torque shown in the graph (described above). What is the disk's angular velocity at t = 12s? Please help!

2007-11-13 11:01:37 · 1 answers · asked by sean77771 1 in Physics

We'll i just discovered that im some-what psychic or might be! but its a very strong "might be" Anyways, for you experienced psychics, i touch peoples hands and then i see pictures always PICTURES like random thinks i.e chickens, diamonds, flowers, hearts, strawberries all that good stuff. How do i break them down so i know what they mean? im confused! and dont tell me maybe i dont have it! cause i see pictures before things happen or events and if i say things they happen...like if i want it 2 rain, it'll rain. THANKS! God BLESS

2007-11-13 10:58:00 · 14 answers · asked by Anonymous in Paranormal Phenomena

At STP, 0.160 L of a gas weighs 0.400 g. Calculate the molar mass of the gas. (g/mol)

any help is appreciated

2007-11-13 10:53:04 · 1 answers · asked by loveall 3 in Chemistry

how does hydraulics and pneumatics move things?
good answer and get 10 points

2007-11-13 10:51:52 · 3 answers · asked by maria s 1 in Engineering

The complementary relation S is the set of ordered pairs {(a.b) | (a,b) not € R}. Let R be the relation R = {(a,b) | a < b} on the set of integers. Find R^1 and S.

2007-11-13 10:51:44 · 1 answers · asked by Anonymous in Mathematics

2007-11-13 10:49:50 · 5 answers · asked by Anonymous in Astronomy & Space

Not just bunkers and where houses and crystal city, but ones that are suppose to contain a small civilization. For example the one that was on the first episode of star trek voyager.

2007-11-13 10:48:19 · 2 answers · asked by josh.corey 1 in Engineering

A forest ranger in a tower 128m high observes two fires in the same line of sight with angles of depression 42 degrees and 61 degrees . How far apart are the fires.

2007-11-13 10:47:44 · 2 answers · asked by Anonymous in Mathematics

That's all my prelab asks. What does that mean and what is the answer? I put "When all of the reactants involved have fully reacted, leaving excess product behind."

2007-11-13 10:46:18 · 1 answers · asked by E 2 in Chemistry

2007-11-13 10:43:10 · 3 answers · asked by mr misery 1 in Chemistry

Ok the coordinates are (5,3) and (2,6)...

now i checked it on a graph and i got 3/3 but when I do
m=6-5/2-3...I get 1/-1 and not 3. What am i doing wrong? or am i doing it right?

2007-11-13 10:39:51 · 5 answers · asked by coconc93 1 in Mathematics

2007-11-13 10:39:45 · 2 answers · asked by question 2 in Astronomy & Space

A. [Cu(NH3)4]^2+
B. [AgNH3)2]^+
C. [Pt(NH3)2Cl2]
D. [Co(en)2Cl2]^+
E. None of these has a coordination number of 6

2007-11-13 10:39:15 · 3 answers · asked by aweeks_06 1 in Chemistry

write a numerical or algebraic expression for 9 less than 12

2007-11-13 10:34:04 · 4 answers · asked by mzdino 2 in Mathematics

How do you order these from largest to smallest atomic radii? How do you know which is larger?


Cl-
Al3+
Na+
F-
Mg2

2007-11-13 10:27:04 · 1 answers · asked by Aspire 3 in Chemistry

and also worried of the side effects of analgesics.. i know from a friend that anti-depressant not only can take the headache away but also makes you feel better.

2007-11-13 10:22:27 · 9 answers · asked by Etoile 1 in Medicine

2007-11-13 10:21:50 · 1 answers · asked by Anonymous in Earth Sciences & Geology

ok so
pWrite the balanced chemical equation for the reaction of zinc metal Zn(s) in aqueous copper (II) bromide, CuBr2 (aq)

___________(s)+__________ (aq) -> ______(aq)
+ _______(s) (single replacement reaction


2. how many moles is in .69 grams of Zn??


3 Using the answer above and the proper mole ration from the balanced equation , how many moles of the solid copper will form??



4.Finall how many grams of copper are in the moles of copper calculated in step 3


5 was the reaction endo thermic or exo thermic???




guys plzz help out and explain wat u did im having a hard time wid chemistry and the teacher shouldnt even have a teaching license

2007-11-13 10:20:43 · 7 answers · asked by Anonymous in Chemistry

Obviously to treat you, it would be best. But in terms of money, if you do tell him/her, will they report it in your permanent insurance records and therefore raise your insurance premiums??

2007-11-13 10:15:03 · 16 answers · asked by steph833 3 in Medicine

2007-11-13 10:14:49 · 8 answers · asked by DOndray A 1 in Engineering

A. Enthalpy
B. Resonance
C. Entropy
D. Hydrogen Bonding
E. Hydration

2007-11-13 10:14:13 · 1 answers · asked by aweeks_06 1 in Chemistry

I'm not sure if this is possible - but let see:

I want to find the moment generating function (mgf) of x1/(x1+x2) given that I know the mgf of both x1 and x2.

Can this be done using mgfs? - any references??
thanks.

2007-11-13 10:11:47 · 1 answers · asked by Remolabarca31 1 in Mathematics

If the moon landings were faked for propoganda reasons, as many today contend, how can the emotionally convincing interviews with the former Apollo astronauts in the recent movie 'Shadow of the Moon' be explained?

2007-11-13 10:11:12 · 11 answers · asked by Anonymous in Astronomy & Space

2007-11-13 10:07:55 · 1 answers · asked by Kath 1 in Astronomy & Space

2007-11-13 10:06:08 · 3 answers · asked by xxbalibluexx 1 in Physics

This is a physics concept question and I have no clue.

2007-11-13 10:05:45 · 3 answers · asked by JQ 9 2 in Physics

And where can i find info on cloning humans.
Thank you

2007-11-13 10:04:22 · 3 answers · asked by Anonymous in Biology

I have 237 cubic yards of stone(ca-6) how do i convert this to tons.

2007-11-13 10:02:11 · 6 answers · asked by demetriusfree 1 in Engineering

The axis of the cone is vertical, but it is not very important.

What is minimal distance between the chain and the tip of the cone?

2007-11-13 10:00:49 · 2 answers · asked by Alexander 6 in Physics

This is a serious question.
I can open/close the gas valve remotely but also need to ignite it remotely.
Thanks.

2007-11-13 10:00:37 · 17 answers · asked by RT 5 in Engineering