Science & Mathematics - 30 October 2007

2007-10-30 20:03:42 · 8 answers · asked by Adawg 3 in Chemistry

what is the area formula for square?

2007-10-30 19:58:09 · 8 answers · asked by rachel 1 in Mathematics

If a magnetic field is affected by temp, then if the ice caps melt could east and west become magnetic north and south?

2007-10-30 19:55:27 · 5 answers · asked by tomiac81 2 in Earth Sciences & Geology

Would my doctor be able to order one for me (to give to me)?
Just wondering.

2007-10-30 19:55:01 · 4 answers · asked by freshbliss 6 in Medicine

If production line A can produce 12.5 units in an hour and production line B can produce
15.25 units in an hour, how long will the production line A have to work to produce the
same amount of units as line B?
the answer is 1.22 hours..
If you can show me the work ,and how you arrived at the answer ,you would help me out tremendously . It is a sample question that will be on an exam for employment that I am taking on Thursday ..thanks in advance..and 10 points for the 1st correct answerer.

2007-10-30 19:53:42 · 13 answers · asked by Dfirefox 6 in Mathematics

∫4cos7xcos3x dx

2007-10-30 19:52:56 · 4 answers · asked by mikemallow 1 in Mathematics

I have this problem on my math homework. Unfortunately, I put it off until the last minute and I don't remember how to do it.
We've been rewriting exponential functions and solving them. How do I do this?

100(1.04)^2t=300

And can you also explain the math behind what I'm doing for other problems.

Thank you!!

2007-10-30 19:45:42 · 3 answers · asked by mew1033 2 in Mathematics

A massless spring of spring constant k is mounted on a turntable of rotation inertia I.the turntable is on a frictionless vertical acle,though initially it is not rotating.the spring is compressed a distance dx from its equilibrium,with a mass m placed against it.when the spring si released,the mass leaves the spring moving at right angles to a line through the center of the turntable,at a distance b from the denter,and slides without friction across the table and off find expression for a)the linear speed of the mass and b) the rotational speed of turntable?

2007-10-30 19:43:29 · 1 answers · asked by john m 1 in Physics

2007-10-30 19:38:13 · 1 answers · asked by saibalengineering 1 in Engineering

To make an electric magnet I have a wire a battery and a piece of iron - the only problem is the piece of iron has a small hole right through the middle of it and im wondering if it will still become magnetic?

2007-10-30 19:25:24 · 2 answers · asked by George W 1 in Physics

with a high magnitude

2007-10-30 19:21:51 · 6 answers · asked by CrazyOne 1 in Earth Sciences & Geology

2007-10-30 19:13:29 · 3 answers · asked by Anonymous in Medicine

2007-10-30 19:12:45 · 4 answers · asked by Anonymous in Mathematics

Why are doorframes safe places to be during an earthquake? I heard this a lot while growing up but I don't remember why this is.

2007-10-30 19:07:43 · 7 answers · asked by tangman30 1 in Earth Sciences & Geology

Assume that it is known that the adjoint of a matrix A is

adj A=
–6 –4 -8
-4 -4 -6
6 3 8

Then A itself is either ___ ___ ___
___ ___ ___
___ ___ ___
or
___ ____ ___
___ ____ ___
___ ____ ___

2007-10-30 19:05:19 · 2 answers · asked by Anonymous in Mathematics

I have heard Gingko Bilboa reduces memory loss. I researched the net and found 3 studies which said it was worthless, and of yet another company that pulled out from getting FDA approval for a product based around it.

Can anyone pont me to a study (pref double blind) which supports Gingko in improving ones memory?

2007-10-30 19:03:20 · 1 answers · asked by Anonymous in Medicine

If lnx+ln(x–4)=ln2x
then x=?

2007-10-30 19:01:59 · 3 answers · asked by Anonymous in Mathematics

Two points equidistant from the sides of an angle lie on the bisector. Is this always, sometimes, or never true?

I believe its sometimes because two points can be equidistant but be outside of the angle or equidistant and not touching the midpoint in the center of the angle. Explain your answer please and thank you.

2007-10-30 19:00:04 · 3 answers · asked by Chead 1 in Mathematics

2007-10-30 18:59:33 · 7 answers · asked by johnny b 2 in Mathematics

wat are landforms in the amazon rain forest?

2007-10-30 18:59:06 · 2 answers · asked by skater_girl2001 1 in Geography

2007-10-30 18:58:57 · 5 answers · asked by orange l 1 in Chemistry

all in English

2007-10-30 18:55:07 · 12 answers · asked by Cathy H 2 in Astronomy & Space

2007-10-30 18:50:00 · 20 answers · asked by Anonymous in Biology

2007-10-30 18:44:47 · 8 answers · asked by Anonymous in Astronomy & Space

2007-10-30 18:42:08 · 1 answers · asked by Dhruv 2 in Other - Science

Assume that A and B are 3x3 matrices with det A= –4 and det B= –5 . Then
det((A^–1)–3adj(A))

2007-10-30 18:39:04 · 1 answers · asked by Anonymous in Mathematics

what is planet venus made from???????????????????

2007-10-30 18:30:35 · 5 answers · asked by Anonymous in Astronomy & Space

does anyone know if we might have an earthquake at 3 a.m. in san jose again?
(pacific time)

my friends said so, but i'm not quite sure.

2007-10-30 18:25:20 · 4 answers · asked by stephanie 4 in Earth Sciences & Geology

i need this answer in degrees celcius

plzzzzzzzzzzzz

2007-10-30 18:22:29 · 3 answers · asked by Anonymous in Astronomy & Space

(A) adenine, (B) ribose, (C) glucose, (D) glycogen

2007-10-30 18:22:25 · 2 answers · asked by pinklover 1 in Biology