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Science & Mathematics - 23 October 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

I was shown this doc. by a good friend who was a scientist (he has now passed). it was about the alignment of the planets with the sun and the effect it would have on our planet. It stated that the world would start to have more and deadlier natural disasters from May 2001, if you follow world events this is now happening.

2007-10-23 11:25:51 · 2 answers · asked by carcotacisim2001 1 in Astronomy & Space

you can find the problem here: http://www.geocities.com/shinryuken18/assignent.jpg

i am trying to find out how to solve for R6 or if the resistor is even to be included in the problem. i'm trying to find the voltage and current through each resistor

2007-10-23 11:25:29 · 2 answers · asked by shinryuken18 1 in Engineering

What is the difference in urban,suburban,and rural..is it like urban is living in the city and suburban is living in the outskirts and rural is the country???

2007-10-23 11:24:40 · 2 answers · asked by Reckless Redhead 2 in Geography

1. use differentials to approxmiate rad(4.9)

2. for what value of x is the line tangent to y =x^2 parallel to the line tangent to y = x^(1/2)
(i know you have to get the derivative of y for both equation and put it equal to each other, but i cant figure it out..

3. A 17foot ladder is sliding down a wall at a rate of -5ft/sec. When the top of the ladder is 8 ft from the gound how fast is the foot of the ladder sliding away from the wall.

2007-10-23 11:21:27 · 1 answers · asked by Anonymous in Mathematics

Thanks. I need to know for my cousin.

2007-10-23 11:19:08 · 17 answers · asked by Somily K 3 in Geography

I am doing a biology project and I need to find a picture labeled of a picture of a human stem cell do you know where I could find one? I tried googling it and looking on a bunch of websites but I couldn't find really any pictures of it. Please help. 10 points for the one who finds a picture for me any picture. thanks

2007-10-23 11:18:41 · 1 answers · asked by iloveyou6 2 in Biology

Can anyone help me graph this and in a way explain to me how it is the equation my teacher gave me is:
/x/ + /y/ = 1 ; // is the absolute value. My teacher does not give me any numbers to plug in for x or y but she does suggest something about four, I believe it has to do with the plus and minus but I am not entirely sure. Please help thanks

2007-10-23 11:17:52 · 1 answers · asked by NA 1 in Mathematics

i have no idea how to do this any help please:

xy=12

y= 2x+2

2007-10-23 11:16:51 · 3 answers · asked by HEy 3 in Mathematics

Expand (1+x+2x^2)^6 in ascending powers of x upto and including x^3

I have tried to go around this problem by

expanding (1+y)^6

This gives me 1 + 6y + 15y^2 + 20y^3 +15y^4 +

6y^5 + y^6

I then substitute x + 2x^2 into the expansion

as y. I do this upto 20y^3

This gives 1 + 6x + 12x^2 + 15x^2 + 60x^4 +

20x^3 + 160x^6

I then simplify this to give my final answer of

1 + 6x + 27x^2 + 20x^3

I belive this is correct but online binomial

expansion calculators say the answer should be

1 + 6x + 27x^2 + 80x^3

I dont understand why i am not getting 80x^3

Please help?

2007-10-23 11:16:36 · 1 answers · asked by ur having a right laugh innit 2 in Mathematics

How much starlight and heat could recive a planet located in the must crowded star zone near the center of our galaxy ("obvious at night")

2007-10-23 11:15:11 · 3 answers · asked by Julianxiii 4 in Astronomy & Space

Does the acceleration due to gravity increase as latitude increases?

2007-10-23 11:13:47 · 5 answers · asked by Anonymous in Physics

Do you know what time is it, now, in Southeast Brazil? (Hint: It's later than you think...)

2007-10-23 11:11:59 · 11 answers · asked by Moon :) 7 in Geography

If you extract the DNA from a single strand of hair, is there enought information provided for you to see a 3D model of the person?

2007-10-23 11:10:17 · 6 answers · asked by Anonymous in Biology

I'm forgetting how to differentiate!

2007-10-23 11:03:52 · 3 answers · asked by RogerDodger 1 in Mathematics

a) cos0=0.49
b) tan0=1

Next question.
2. Find O.
a) cos0=2/5

Thanks for helping.

2007-10-23 11:03:49 · 2 answers · asked by txlady 2 in Mathematics

4x + 6 ≥ 34.

2007-10-23 11:03:18 · 7 answers · asked by catmuffin 1 in Mathematics

A baseball is thrown from the roof of a building of height 21.6 m with an initial velocity of magnitude 11.7 m/s and directed at an angle of 57.5 degrees above the horizontal.What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance.
Take free fall acceleration to be = 9.80 m/s^2 .

2007-10-23 10:57:08 · 3 answers · asked by Natiphy2007 1 in Physics

The equation of a circle which contains the points A(2,-2)
B(-1,-3) and C(0,-1) is x^2+y^2+__x+__y+4=0

2007-10-23 10:56:32 · 12 answers · asked by ws 3 in Mathematics

In other words, can I take each one independently (a=2 and b=3) as opposed to a fraction only (a/b=2/3 or b/a=3/2)?

2007-10-23 10:55:42 · 9 answers · asked by Tams4Gmat 1 in Mathematics

I need to name and record the elevation of the Highest Point in India.

2007-10-23 10:55:38 · 4 answers · asked by simran936 2 in Geography

A={2,4,8,16}
B={3,9,27,81}

A [upside down U symbol thing]= ? <---------WHATS THE ANSWER

2007-10-23 10:52:04 · 2 answers · asked by hunterhardman93 2 in Mathematics

I'm an amateur astronomer and my telescope is not that great. What can i look at, i have a 25 mm and 9 mm lens. Anything will do i'm just looking to see new things everynight.

2007-10-23 10:45:32 · 3 answers · asked by Anonymous in Astronomy & Space

can you find what x equals

2007-10-23 10:42:36 · 11 answers · asked by Anonymous in Mathematics

each of which has a mass of 240 kg and can be approximated as a thin rod of length R = 6.2 m.

a) What is the total moment of inertia of the two blades about the axis of rotation?

(b) Determine the rotational kinetic energy of the spinning blades.

2007-10-23 10:39:28 · 4 answers · asked by Anonymous in Physics

a batch of light bulbs contains 9 yellow, 5 green, 7 reds, and 4 blue bulbs. three different light bulbs are randomly selected from the batch (WITHOUT REPLACEMENT).

find the probability that exactly two bulbs are blue

tnx for da help^ ^

2007-10-23 10:37:14 · 2 answers · asked by Siela 1 in Mathematics

what is the average of 1/(x+2) and 1/(x-2)?

2007-10-23 10:35:37 · 7 answers · asked by Anonymous in Mathematics

The preportions are simply those of a square attatched to half of another congruent square, divided diagonally. The puzzle is to cut the figure into four pieces which are congruent in nature.

I dont have the figure but it is a trapezoid. Pretend there is a 4x4 square and a right triangle with a base of 4 and height of 4. So overall, the figure has a 8 base, 4 height, 4 across on top, and a diagonal connecting to the base.

2007-10-23 10:33:46 · 1 answers · asked by FSBB 1 in Mathematics

2007-10-23 10:33:01 · 11 answers · asked by Anonymous in Mathematics

2007-10-23 10:31:47 · 9 answers · asked by Anonymous in Mathematics

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