Science & Mathematics - 1 December 2006

A rancher wants to fence in an area of 3000000 square feet in a rectangular field and then divide it in half with a fence down the middle parallel to one side. What is the shortest length of fence that the rancher can use?
i really need help on this problem can someone help me?

2006-12-01 14:25:45 · 3 answers · asked by Anonymous in Mathematics

Does you weight change once you leave the earth? What about your mass? GOOD LUCK!!

2006-12-01 14:25:19 · 4 answers · asked by Rascal_Flatts_Fanatic! 2 in Earth Sciences & Geology

I would like to know whether this converges (like the sum of the reciprocals of all twin primes) or diverges (like the sum of the reciprocals of all primes). If it converges, what does it converge to? And how do we know that those series converge and diverge?

2006-12-01 14:24:04 · 6 answers · asked by Robert S 1 in Mathematics

Just please explain this to me !

2006-12-01 14:23:22 · 3 answers · asked by C_ster 1 in Biology

2006-12-01 14:21:15 · 20 answers · asked by adam 1 in Other - Alternative

2006-12-01 14:20:45 · 16 answers · asked by rusalka 3 in Astronomy & Space

A "massless" balloon is filled with 1.5 m^3 of helium. Gravity = 9.8 m/s^2. What is the maximum weight that it can lift in air? Assume density of air is 1.2 kg/m^3 ans that of helium is 0.177 kg/m^3. Answer in N.

2006-12-01 14:18:11 · 3 answers · asked by Jonathan V 1 in Physics

this is base on STEPHEN HAWKING'S idea. do you agree or disagree?

2006-12-01 14:12:42 · 9 answers · asked by Anonymous in Astronomy & Space

Stuck on some homework and I have a test Wednesday!

F(s)=L{f(t)}
f(t) is a piecewise continuous and of exponential order [0,infinity)

I need to show that...
L{(integral from 0 to t)f(x)dx}=(1/s)F(s)

I'm given a hint to let g(t)=(integral from 0-infinity)f(t))dt and that g'(t)=f(t). Then I'm told to use L{f'(t)}=sL{f(t)}-f(0).

Any help is greatly appreciated! Thanks!

2006-12-01 14:07:19 · 2 answers · asked by jennytkd13 3 in Engineering

An air bubble is initially entrapped in the buret for the standardization of the sodium hydroxide solution. However, during the titration the air bubble is passed from the buret. Will the reported molar concentration of the sodium hydroxide be reported as too high, too low, or unchanged as a result? Explain.

2006-12-01 14:06:35 · 4 answers · asked by ZG786 1 in Chemistry

2006-12-01 14:04:04 · 9 answers · asked by Claudia V 1 in Mathematics

Phenolphthalein is a weak organic acid, being colorless in an acidic solution and pink ( because of the color of its conjugate base) in a base solution. The Experimental Procedure suggests the addition of 2 drops of phenolphthalein for the standardization of the sodium hydroxide solution. Explain why the analysis will be less accurate with the addition of a larger amount, e.g., 20 drops, of phenolphthalein.

2006-12-01 14:03:41 · 6 answers · asked by ZG786 1 in Chemistry

Where might I find technical drawings in sufficient detail to facilitate the fabrication of a working replica of the Antikythera Mechanism?

2006-12-01 14:01:54 · 3 answers · asked by Euclid 1 in Engineering

2006-12-01 14:01:49 · 15 answers · asked by Anonymous in Weather

2006-12-01 14:01:35 · 17 answers · asked by Anonymous in Mathematics

2006-12-01 13:58:14 · 7 answers · asked by Anonymous in Other - Science

by three

2006-12-01 13:56:34 · 7 answers · asked by browndog513 2 in Mathematics

A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 41 feet? does neone know how to do this question?

2006-12-01 13:52:40 · 3 answers · asked by theendless.summer 1 in Mathematics

2006-12-01 13:50:59 · 2 answers · asked by Reggie B 1 in Astronomy & Space

find scalars c1,c2,c3 such that c1(1,1,0)+c2(1,0,1)+c3(0,1,1)=(1,-1,2)

2006-12-01 13:50:56 · 3 answers · asked by kondiii 1 in Mathematics

use all the didgets 1-9 when trying to represent one half =)

2006-12-01 13:50:03 · 5 answers · asked by Anonymous in Mathematics

Are these pictures of Giant Squid or another specie, perhaps a Colossal Squid or Moroteuthis?

-http://www.pref.kyoto.jp/kaiyo/2-topicnews/news/2002/02-02-01/mega-squid/mega-squid-02.html#COMTOP

-http://www.pref.kyoto.jp/kaiyo/2-topicnews/news/2002/02-02-01/mega-squid/mega-squid-01.html

2006-12-01 13:44:40 · 3 answers · asked by Tommy S 1 in Zoology

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=9-x^2. What are the dimensions of such a rectangle with the greatest possible area?
width=?
height=?
could someone help me out in how to do this problem?

2006-12-01 13:43:03 · 4 answers · asked by Anonymous in Mathematics

2006-12-01 13:37:20 · 4 answers · asked by soredog 1 in Geography

2006-12-01 13:34:15 · 12 answers · asked by volkgal 4 in Weather

I ask because our local hospital has a set of 24 antennas on the roof of its Maternity Building.

2006-12-01 13:33:25 · 3 answers · asked by rarosera 1 in Physics

Okay, I know the pattern for this is just the numbers (1, 2, 3, ect) squared.

My question is, why is there also the pattern of adding odd numbers starting at 3?

For example 1+3=4 4+5=9 9+7=16 16+9=25 11+13=36

2006-12-01 13:33:01 · 7 answers · asked by MathGirl 1 in Mathematics

2006-12-01 13:29:57 · 8 answers · asked by Feed the models! 4 in Mathematics

2006-12-01 13:23:09 · 7 answers · asked by Billy S 2 in Zoology

2006-12-01 13:23:04 · 5 answers · asked by Anonymous in Physics