Science & Mathematics - 23 September 2007

2007-09-23 07:28:07 · 1 answers · asked by JAMES 4 in Engineering

plzzz answer it its something to do with vector, but i dont know it.

2007-09-23 07:26:10 · 3 answers · asked by nice_ girl 1 in Mathematics

how does the liquid and solid differ in the effect of ur body?

2007-09-23 07:22:46 · 4 answers · asked by CareBear 1 in Medicine

why are there free electrons in the metal?

2007-09-23 07:22:36 · 1 answers · asked by JAMES 4 in Engineering

2007-09-23 07:22:07 · 7 answers · asked by scrabs11 1 in Geography

Hi everyone,

I have the problem y = 2x^2 -4x -9, and have to find the x-intercept.

2007-09-23 07:20:31 · 4 answers · asked by Anonymous in Mathematics

2007-09-23 07:19:47 · 4 answers · asked by dammad 2 in Earth Sciences & Geology

i missed the day where we learned
whats the answer to
If you have 900 g of water, how many mL do you have?

What is the density of water in g/cm3?

What is the density of water in g/mL?

2007-09-23 07:19:28 · 3 answers · asked by dana 2 in Chemistry

I am trying to develop my telekinetic powers because i've wanted to do this before and now I have time to sit down and train regardless of time or my messups.

2007-09-23 07:17:07 · 11 answers · asked by myshunoguy 2 in Paranormal Phenomena

SOME MY FRIENDS SAY THAT GRAND CANYON IS JUST 2 KM BIG .
I THINK ITS MUCH BIGGER, BUT DO NOT NO RIGHT ANSWER . ANYONE WHO KNOW RIGHT ANSWER WILL HELP , THANX.

2007-09-23 07:16:24 · 5 answers · asked by angell z 1 in Earth Sciences & Geology

You can think of the work-kinetic energy theorem as a second theory of motion, parallel to Newton's laws in describing how outside influences affect the motion of an object. In this problem work out parts (a) and (b) separately from parts (c) and (d) to compare the predictions of the two theories. In a rifle barrel, a 15.0 g bullet is accelerated from rest to a speed of 740 m/s. (a) Find the work that is done on the bullet in kJ. (b) If the rifle barrel is 70.0 cm long, find the magnitude of the average total force that acted on it, as F = W / (r cos ) in kN. (c) Find the constant acceleration of a bullet that starts from rest and gains a speed of 740 m/s over a distance of 70.0 cm in km/s^2. (d) If the bullet has mass 15.0 g, find the total force that acted on it as F = ma in kN.

2007-09-23 07:16:22 · 1 answers · asked by green 1 in Physics

I need a foreign company that has factories located in the UK (where in the UK). I need the name of it, what it sells/makes, where they are based in the world and roughly how successful they are.

I no it's alot but thank you so much. xx

2007-09-23 07:15:07 · 10 answers · asked by alisha 1 in Geography

When flour mixed with Iodine / Lugol's, the flour turned purple on contact, but why did this happen? The flour and Iodine were mixed inside a test tube with water, although I don't think this info would be necessary.

So...

Why does flour turn purple when mixed with Iodine?

2007-09-23 07:15:04 · 1 answers · asked by UnknownD 6 in Chemistry

1. In Taxi cab geometry how is distance measured?
2. solve for pi in pi*d
11. Compute the circumference of the circle x2+y2=9 giving the exact value and the value to three significant digits
12. What is the value of pi you used to give the approximate value
14. find the circumference of the taxi circle (x2+y2=9)
15. Find the value of pi in taxi cab geometry
16. Will the value of pi always be the same value you computed in #15? Dont guess use at least one equation with a different radius and another equation with a different center and show work in your journal!

2007-09-23 07:13:53 · 2 answers · asked by Zoology 1 in Mathematics

i mean that in math there is a term that is ''real numbers'' but i dont know what it means.

2007-09-23 07:13:01 · 9 answers · asked by Anonymous in Mathematics

why is the sea so salty

2007-09-23 07:11:30 · 6 answers · asked by JULIA S 1 in Earth Sciences & Geology

A car in a roller coaster moves along a track. In the time interval from t=0 to t=4 s, where A is a positive dimensionless constant.

v = sqrt[(A^2 + (3At^2 + 12At)^2]

The roller coaster is designed according to safety regulations that prohibit the speed of the car from exceeding 20 m/s . Find the maximum value of A allowed by these regulations.

2007-09-23 07:04:08 · 1 answers · asked by Tommy 2 in Mathematics

All distant galaxies are moving away from our galaxy because our galaxy is at the center of the universe.

2007-09-23 07:01:37 · 37 answers · asked by #1 padres fan 3 in Astronomy & Space

2007-09-23 07:00:42 · 8 answers · asked by tablesawtom 2 in Mathematics

Differentiate.

z = w^(3/2)(w + ce^w)
z'(w)= ?

w is the variable

2007-09-23 06:59:54 · 2 answers · asked by Anonymous in Mathematics

and do you know where they start like point a to point b?

2007-09-23 06:56:08 · 1 answers · asked by dude 5 in Engineering

how to I even begin to factor this equation?? Any help would be appreciated.


X^5 - X^3 + 4X^2 - 4


Thanks.

2007-09-23 06:55:26 · 4 answers · asked by Adam W 2 in Mathematics

i typed in the data on 2 columns (L1 and L2) so how do i find the slope for this data then find the line of best fit using the graphing calcuator.

2007-09-23 06:54:29 · 2 answers · asked by Anonymous in Mathematics

how do i go about proving the following:
let n be a positive integer. prove that n and (n+1) must be relatively prime. help!

2007-09-23 06:53:04 · 2 answers · asked by Anonymous in Mathematics

how do you solve a problem in y=mx+b form

2007-09-23 06:50:48 · 1 answers · asked by Anonymous in Mathematics

2007-09-23 06:50:45 · 5 answers · asked by Colette B 1 in Mathematics

2007-09-23 06:49:30 · 14 answers · asked by Anonymous in Astronomy & Space

I have two equations both functions of t(time)

y(t) = -4.9x^2 + 20x

x(t) = 10x

I want to make y a function of x. y(x).

I've thought about it and just keep gettin y(x) = -0.49x + 2 I know it's not right. The function will be a parabola. Please don't tell me to make a plot graph. I don't do graphs. They're so innacurate.

I know there is a way to do it mathematically. I just need some help.

2007-09-23 06:43:25 · 2 answers · asked by Snipe_AT 2 in Mathematics

I'm fine with basic inverse functions but I am still having trouble with some ie e^(2-sqrt(x)). Working backwards I end up with ln2+x^2 but I know thats incorrect. Please advise, thanks

2007-09-23 06:42:30 · 3 answers · asked by John Avry 2 in Mathematics

The set of points on the plane with integer coordinates over the filed of real numbers do not form a vector space because while there is closure for vector addition, there is no closure for scalar multiplication.
(1/2) • (1,3) = (1/2, 3/2)
Why can't you define the scalars as a set of integers?

2007-09-23 06:41:07 · 1 answers · asked by ? 3 in Mathematics