Science & Mathematics - 10 December 2007

from the nerve impulse occurs because of the release of
sodium
calcium
potassium

2007-12-10 07:13:10 · 2 answers · asked by Anonymous in Zoology

Also evaluate 125 to the 1/3 power and 144 to the 1/2 power!

2007-12-10 07:12:57 · 4 answers · asked by Mir Mir 1 in Mathematics

which is it?

2007-12-10 07:12:11 · 6 answers · asked by Anonymous in Biology

Explain Please?

*To the best answer

2007-12-10 07:11:11 · 3 answers · asked by Sarah I 2 in Mathematics

I tried to divide both side by x but the answer came out very horrible...I'm not sure which formular to use

2007-12-10 07:10:44 · 7 answers · asked by Anonymous in Mathematics

A child causes a wagon to accelerate by pulling it with a horizontal force. Newton's third law says that the wagon exerts an equal and opposite force on the child. How can the wagon accelerate?

2007-12-10 07:08:38 · 2 answers · asked by x x italian baby x x 1 in Physics

If the length of a piano wire (of given density) is increased by 5%, what approximate change in tension is necessary to keep its fundamental frequency unchanged?

A) Increase of 10%
B) Increase of 5%
C) Decrease of 5%
D) Decrease of 10%
E) Decrease of 20%

2007-12-10 07:07:09 · 1 answers · asked by ppapin 1 in Physics

calculate the value of a,b and c
find the coordinates of the min point A

2007-12-10 07:05:44 · 3 answers · asked by ? 4 in Mathematics

Can anyone help me to solve the following integral by parts. I have no idea how to start.

xe^x / (x+1)^2

2007-12-10 07:05:19 · 3 answers · asked by Anonymous in Mathematics

I have this theory ... I don't think we ever got visited by the future .. why? ( i mean eventually maybe people discover in the latest future how to build a machine time ) .. Well we maybe weren't visited because people couldn't travel before the time machine was invented ... and so they could only travel in the future and back into the time when the machine were to be invented. And since we haven't built one yet there is no one from the future to be seen.
Second ... theory is that humanity was destroyed before anyone could of built such a machine, and of course maybe we will never get to discover such a technology.

Well tell me your opinion ... it's more like a sci-fi topic but i'm sure you guys are more informed about this thing than i am :).

2007-12-10 07:05:11 · 12 answers · asked by Andrew177 3 in Astronomy & Space

The plugs are compatable.

2007-12-10 07:05:07 · 2 answers · asked by Anonymous in Engineering

how do people use radioactive materials and how are they handled

2007-12-10 07:04:31 · 5 answers · asked by \-696))) es.s.s.AnswERA (((6 1 in Earth Sciences & Geology

How would i make a paper airplane that goes really slow? i need it to go atleast 5 feet. it can only be made out of one 11 by 8.5 piece of paper. how should i fold it? it should take longer than 11 seconds to go 5 feet. any suggestions?

2007-12-10 07:04:00 · 3 answers · asked by Anonymous in Engineering

with a corpus luteum (CL) present on the right ovary. The cow was examined at 48 days into her lactation and found to have a CL present on the left ovary and uterine horns that were 2.5 cm in diameter on each side. She was bred via artificial insemination on day 82 post-partum. Which one of the following would be a cardinal sign of the suspected pregnancy at this examination?
corpus luteum
ballotment of the fetus
identification of fetal membrane slip

2007-12-10 07:02:51 · 2 answers · asked by Anonymous in Zoology

1. Find the dimensions of a rectangle whose perimeter is 46 m and whose area is 126 m (squared).

2. Find the dimensions of a rectangle whose perimeter is 42 m and whose area is 104 m (squared)

2007-12-10 06:57:45 · 6 answers · asked by Teddy bear, brand,milk 1 in Mathematics

This is just a question that is very easy and I want 2 see how many people know the answer, like I said it is VERY EASY!!!! express 24/5 as a mixed number!!!! LOL! EASY!!!!

2007-12-10 06:57:28 · 6 answers · asked by Sophia N. 2 in Mathematics

Suppose that the function P=12+50ln x represents the percentage of inbound e-mail in the U.S. that is considered spam, where x is the number of years after 2001.

Carry all calculations to six decimals on each intermediate step, when necessary.

a) Use this model to approximate the percentage of spam in the year 2005.

Answer:

b) Use this model to approximate the year that the percent of spam will reach 90% provided that law enforcement regarding spammers does not change?

Answer:

2007-12-10 06:56:09 · 4 answers · asked by ViewSonic 2 in Mathematics

A golf ball is hit at a speed of 30 m/s at an angle of 450 above the horizontal. What is the maximum height of the ball?
(I get 22.96m, is this correct?)

2007-12-10 06:54:04 · 3 answers · asked by Anonymous in Physics

im in SF, looking south, generally towards San Jose, and towards ARC. and just saw something leaving a jet trail going straight up in the air, it looked like it never stopped. anyone know what this was. It is 11:52 am you can prob still see the trail

2007-12-10 06:53:14 · 6 answers · asked by wcbryan22 1 in Astronomy & Space

The forces acting on a sailboat are 390N north and 180N east. If the boat(including crew) has a mass of 270 kg, what are the magnitude and direction of the boat's acceleration?

2007-12-10 06:52:52 · 1 answers · asked by x x italian baby x x 1 in Physics

real quick and simple if possible, can't get it set up just right.

2007-12-10 06:52:39 · 1 answers · asked by Anonymous in Mathematics

Is neon gas a man made gas or a gas that comes from within the earth?

2007-12-10 06:52:05 · 3 answers · asked by Girl 4 God 3 in Chemistry

2007-12-10 06:47:25 · 10 answers · asked by Anonymous in Geography

In which kind of cross would you expect to find exactly the anticipated ratios every time the cross is made?

a. monohybrid cross

b. dihybrid cross

c. test cross

d. none of the choices are correct.

Is it a???? Maybe d.

2007-12-10 06:47:08 · 4 answers · asked by LJC 2 in Biology

Here is the question:

"What is the solution to the quadratic equation below"

X^2 - 2x - 24 = 0

A. x= -4, x= 6

B. x=4, x= -6

C. x= -8, x= 3

D. x= -4, x= -6

Im only 13 so please do not insult if its too easy, thanks

2007-12-10 06:47:02 · 9 answers · asked by Anonymous in Mathematics

2007-12-10 06:46:16 · 4 answers · asked by STORMY K 3 in Physics

2007-12-10 06:45:44 · 13 answers · asked by mikey 3 in Other - Alternative

I am having trouble with this problem, can anyone help?
Find the absolute extrema of the function f(x) = x^3 - 6x^2 + 9x - 8 on the interval [1,5]

2007-12-10 06:43:55 · 5 answers · asked by qtpooh83 2 in Mathematics

I'm pretty sure the answer is supposed to be pi/3, but I just wanted to confirm this. What is arccos(1/2) equal to in radians?

2007-12-10 06:43:26 · 6 answers · asked by Flauta 2 in Mathematics

2007-12-10 06:43:10 · 3 answers · asked by Brother Enrique 3 in Geography