Science & Mathematics - 3 December 2006

I think i can substitute for tan x and then sketch a graph, but my heads not working... :-(

2006-12-03 02:31:41 · 9 answers · asked by Crap_At_Maths 2 in Mathematics

X^2+2x-15=0

2006-12-03 02:31:35 · 3 answers · asked by Anonymous in Mathematics

I'm not getting any of the numerical answers from the text book.

a. 1/40
b. 1/24
c. 1/20
d. 1/12
e. 1/8
f. 1/6
g. 1/4
h. 1/2
i. none of these

2006-12-03 02:30:29 · 2 answers · asked by Olivia 4 in Mathematics

I know that pressure is Force/Area but I have an investigation and am unsure what I should take to be my area.

Here is my method:

The equipment was set up corresponding to measurements already decided (e.g. how far away the hairdryer is away from the scales); one wooden boards was stuck on to the top of the weighing scales and the scales were reset to zero while another identical woodem board was – with clamps supporting it either side as to stop it dipping – parallel to the first but x cm above.
Air was then blown through the boards by an air source which is x cm’s away from them which produced a reading that I was able to turn in to Newton's.

However should I take the (imaginary) rectangle between the two boards as the measurements for area; or from the air source to the far side of the boards or something else?

I hope that this has made sense! Thanks again! -x-

2006-12-03 02:29:56 · 7 answers · asked by Anonymous in Physics

like what do we use magnesium for everyday?

2006-12-03 02:28:25 · 5 answers · asked by Agent Dib FBI 1 in Medicine

2006-12-03 02:26:21 · 3 answers · asked by Anonymous in Mathematics

2006-12-03 02:23:29 · 5 answers · asked by ralph w 1 in Geography

A force of 1000 pounds compresses a spring 6 inches from its natural length. How much work (in foot pounds, correct to the nearest whole foot pound) is done in compressing the spring an additional 7 inches?

The text book has the following answers...

a. 88
b. 297
c. 400
d. 566
e. 650
f. 688
g. 924
h. 933
i. 1000
j. none of these

2006-12-03 02:22:38 · 3 answers · asked by Doug 2 in Mathematics

Other students have come up with the following answers, which is correct?

3 - 2(2^1/2 )

4 - 2(3^1/2 )

1

6 - 2(5^1/2 )

7 - 2(6^1/2 )

2006-12-03 02:16:42 · 4 answers · asked by Olivia 4 in Mathematics

2006-12-03 02:15:59 · 9 answers · asked by Anonymous in Astronomy & Space

2006-12-03 02:15:35 · 13 answers · asked by STEVE T 4 in Astronomy & Space

f(x) = 250(0.5)^x, x = 3

2006-12-03 02:12:56 · 6 answers · asked by mixed 1 in Mathematics

2006-12-03 02:12:25 · 3 answers · asked by darwin 1 in Physics

2006-12-03 02:12:22 · 6 answers · asked by Anonymous in Physics

2006-12-03 02:11:04 · 3 answers · asked by Amrinder J 1 in Mathematics

-HELP!!!-

2006-12-03 02:09:49 · 1 answers · asked by acerbus18 1 in Biology

A lamp has a cost function of C(x) = 2500 + 10x, where x is the number of units produced and C(x) is in dollars. The revenue function for these lamps is R(x) = 17x - 0.001x^2 . What is the cost, in dollars, of producing the number of lamps which maximizes the profit?

Here are some answers that myself and others have come up with..

$27,500
$32,500
$37,500
$42,500
$47,500
$52,500

2006-12-03 02:08:02 · 2 answers · asked by Doug 2 in Mathematics

Can anybody give me a source, or help me through this topic? I want to know about evaluating potential of points in a field, by dividing it into square meshes, and using this fact that the electrical potential of a point at the corner of one of squares is equal to one fourth of the sum of potentials of points up, down, right, and left of it.

2006-12-03 02:07:11 · 1 answers · asked by IQmand . 2 in Physics

in terms of spaces population,economy,

2006-12-03 02:02:53 · 30 answers · asked by Caroline O 1 in Geography

2006-12-03 02:02:18 · 33 answers · asked by nigel d 2 in Mathematics

2006-12-03 02:02:04 · 9 answers · asked by swetank_bhu 1 in Mathematics

A woman who has blood type A, has a daughter who is type O. What is the blood type of the father?


A. A

B. B

C. AB

D. O

E. two of the above

F. three of the above

D. all of the above

2006-12-03 02:01:45 · 16 answers · asked by Anonymous in Biology

2006-12-03 02:01:38 · 3 answers · asked by STEVE T 4 in Astronomy & Space

2006-12-03 02:01:29 · 4 answers · asked by Bumbo 3 in Physics

im going to compete in an international science fair and my project needs an experiment where we have to simulate the conditions in the stratosphere above antarctica ( where the ozone depletion is in its highest stages) (conditions like temperature, amount of UV radiation ... etc .. any advice ??

2006-12-03 01:59:05 · 1 answers · asked by Anonymous in Chemistry

If Main Street is parallel to First St find the value of x

Oakton St is 381m Main St and First St are parallel and are 278m Touhy St is 332m

answers are 242m 319m 278m or 455m

2006-12-03 01:58:58 · 2 answers · asked by lynn l 1 in Mathematics

2006-12-03 01:57:53 · 6 answers · asked by Anonymous in Zoology

5 sq rt 6 / sq rt 10

and

1/ 1+sq rt2
How do I solve those problems?

2006-12-03 01:57:14 · 5 answers · asked by Robyn & L 1 in Mathematics

solve the problem-two wheels of radius 15.89cm and 14.29 cm respectively rest on the ground. If the centers of the wheels are 37.85cm apart, how far apart are the points where they touch the ground?

answers can be 34.35cm 37.85 cm 37.82 cm or 35.05 cm

2006-12-03 01:56:42 · 4 answers · asked by lynn l 1 in Mathematics

I am doing a labratory investigation in which we are comparing a heliocentric (sun-centered) and geocentric (earth-centered) model of the solar system. In order to do this we must plot a planet's position in each orbit over a 24 month period.
My question is would the planet be on the same path with each revolution, or could the path be somewhat different. When I did it, my path was not the same with each orbit. Thank you!

2006-12-03 01:56:34 · 2 answers · asked by Br 3 in Astronomy & Space