Science & Mathematics - 2 November 2007

the value of of a resistor is measured by the voltmeter-ammeter method. the internal resistance of the voltmeter is 200ohms. when the voltmeter is connected directly across the resistance to be measured, then the ammeter reads 10a and voltmeter 100v

2007-11-02 20:01:59 · 5 answers · asked by Anonymous in Engineering

Okay, so many people have there opinions. I highly doubt that it will. But i'm curios. Do you think the world will end in 2012? I Have heard more people say no then yes. And people have said that the world has been predicted to end so many times, so I don't think it will happen. If you say yes, could you please explain why? Have a great day/night.

2007-11-02 20:01:45 · 17 answers · asked by Tareasa D 1 in Earth Sciences & Geology

what is the person who assists the doctor peforiming surgery called? does that person get good pay and what is his/her job title???
say for example I am assissting a doctor perform plastic surgery, what is my job title? pay? and what are the prerequisites for the job?

2007-11-02 19:56:33 · 6 answers · asked by starz8 2 in Medicine

2007-11-02 19:49:36 · 13 answers · asked by slkrchck 6 in Geography

2007-11-02 19:42:33 · 7 answers · asked by Vikas Ch 2 in Astronomy & Space

I hate cockroach!

2007-11-02 19:34:32 · 8 answers · asked by Anonymous in Medicine

integral of (x^3 + x) / x ?

i get x^3/3 + x + c

2007-11-02 19:18:25 · 5 answers · asked by alex m 1 in Mathematics

i have need job in european countries

2007-11-02 19:14:48 · 5 answers · asked by sj 1 in Engineering

Assume A,B,C are subsets of a universal set U, and define * as A*B=(A-B)union(B-A). Prove or disprove the following statement: A*B=B*A

I was able to show graphically that (A-B) union (B-A) do not intersect and same for (B-A)union(A-B) which are graphically equal but I couldn't prove it using procedural version of set definitions and identities. Also, I don't know how the subset C takes place in this proof.

Any help will be greatly appreciated!

2007-11-02 19:11:20 · 2 answers · asked by canv74 2 in Mathematics

If Un<---(suppose to read U sub n) represents the nth term of the Fibonacci sequence show that, Un and Un+1<---(suppose to read U sub n+1) are relatively prime. okay, I dont knoq how to start this, and what exactly does the "sub n and sub n+1" do to the U in this sequence I dont see a relation, because the sequence is 1,1, 2, 3, 5, 8,..., x, y, x+y, etc. How do I show these are prime by using what they are asking.

2007-11-02 19:08:39 · 3 answers · asked by busy bee 2 in Mathematics

2007-11-02 19:07:52 · 6 answers · asked by Deepa 2 in Earth Sciences & Geology

Can anyone explain the syminotronics of this area? It's driving me crazy.

2007-11-02 19:05:59 · 3 answers · asked by Anonymous in Engineering

give some expamples please

2007-11-02 19:03:26 · 7 answers · asked by giggs 1 in Physics

what do you think you'd tell yourself? of course we can't tell exactly what it would be, but what SUBJECT do you think the future you would want to tell the you right now?

2007-11-02 18:59:31 · 23 answers · asked by Mercury 2010 7 in Astronomy & Space

What is the quotient of 6x-15 over 3x(squared) +31x + 10 and 2x+1 over 2x(squared) + 15x - 50?

2007-11-02 18:59:28 · 4 answers · asked by Anonymous in Mathematics

1.0 M c2h5oh or 1.0 m c5h12?

2007-11-02 18:57:47 · 3 answers · asked by frenchies 2 in Physics

why is that?

2007-11-02 18:56:29 · 2 answers · asked by frenchies 2 in Physics

Just read a question on him and I have never ever heard of him. Can anyone tell me a bit about him?????

2007-11-02 18:56:28 · 7 answers · asked by Kimberlee Ann 5 in Parapsychology

Do you think a combonation of eastern and western medicine is better than just western medicine alone.

2007-11-02 18:54:51 · 2 answers · asked by bob hoskins 2 in Medicine

what is this?
thanks

2007-11-02 18:54:22 · 0 answers · asked by Boo Radley 4 in Chemistry

(if you could help me answer even one,..)

1. The primary coil of a transformer makes 240 turns around the iron core, and the secondary coil of that transformer makes 80 turns. If the primary voltage is 120 V, why will the secondary voltage be only 40 V?

2. Why does a magnet stick to the surface of a refrigerator?

3. When you have the magnetic strip on an ID or credit card read, it's always done by moving the card past a playback head. Why must the card be moving for the head to read it?

4. partscoretotalsubmissions1--100/1What does exposing the magnetic strip of an ID or credit card to a strong magnetic field do to that strip that makes it unreadable?

thank you in advance

2007-11-02 18:51:43 · 2 answers · asked by smile_swj 1 in Physics

cacl2--> MY ANSWER(CA+2CL)
alcl3---> MY ANSWER(al+3cl)
how do I write balanced EQ for dissociation are they different than normal blaancing?

2007-11-02 18:50:46 · 1 answers · asked by frenchies 2 in Chemistry

how many solar systems like our own are known to us, and if you know any, please tell me where i can read about them.
thank you

2007-11-02 18:50:15 · 5 answers · asked by turk6060 3 in Astronomy & Space

That is, why isn't the inverse of f(x)=x^2, equal to the square root of x?

2007-11-02 18:47:27 · 5 answers · asked by Anonymous in Mathematics

If anyone could help me out with the following physics question, I would appreciate it greatly:

"An aircraft is traveling in a vertical loop of diameter 3000m. The pilot has a mass of 90kg. At the bottom of the loop, the seat exerts 2550N on the man.

a) At what speed is the plane flying?
b)What force does the seat exert on the man when he is upside down at the top of the loop?
c) What is the minimum speed that the plane can fly at so that the man will feel "weightless" at the top of the loop? (ie when will the seat not exert force on him?)"

If you could possibly give me full working out, that would be great. I especially need help with knowing when to add and subtract any force vectors, such as force of gravity and centrifugal force.

Thanks!

2007-11-02 18:46:26 · 3 answers · asked by Robbi 1 in Physics

my study is problem-based, I got a case of a male patient presented with severe pain, redness, hotness of his big toe, with no history of trauma....the rest of the case indicates It's gouty arthritis..anyway, while taking history, the doctor asked the patient about any preceding attacks of urinary tract infection or gastroentritis... I need to know what was that question for?

2007-11-02 18:46:20 · 5 answers · asked by the god father 2 in Medicine

greenwich mean time and not british winter time?

2007-11-02 18:45:43 · 4 answers · asked by Andrew1968 5 in Geography

The topic is about "Simplifying Rational Algebraic Expressions"

1. x (squared) + 11x + 30
-------------------------------- = ?
3ax (squared) + 15ax

2. 4x (squared) - 1
--------------------------- = ?
2x (squared) - 5x - 3

3. an (squared) + 6an + 9a
---------------------------------- = ?
n (squared) - 5x - 3

4. 5x + 20
---------------------------- = ?
15x (squared) + 60x

lastly,

5. x + 1
----------------- = ?
x (cubed) - x

I hope that you get to help me. This is due on Monday. I'm really sorry if it is a bit tensing or something like that. I just can get it at all :( and please if some of you are just here to fool me or something then you're not welcome here. And if some of you are willing to help... thanks a lot!! <3

2007-11-02 18:36:29 · 2 answers · asked by Anonymous in Mathematics

The graph of y= -2 can be described as

a vertical line through the point (0,-2)

a vertical line through the point (-2,0)

a horizontal line through the point (0,-2)

a horizontal line through the point (-2,0)

2007-11-02 18:35:50 · 6 answers · asked by Marcela M 1 in Mathematics

The material stiffness "k" that we model in any mechanical system, can we relate it the inertia of the system?
-The inertia is resistance to motion, but when we talk about stiffness its the measure of how much force is required to deform the material, now in classical spring element, deformation is considered as displacement, does that mean, we are talking about the same thing in different ways??

2007-11-02 18:35:32 · 5 answers · asked by param_mech 2 in Physics