Science & Mathematics - 11 January 2007

what should i use for the cell membrane? help please

2007-01-11 04:22:12 · 5 answers · asked by mini 2 in Biology

Your friend is taking an algebra class that began on week after yours. Expleain to your friend a general strategy for factoring in a very organized way.

2007-01-11 04:21:04 · 5 answers · asked by SweetnSpiceyBrown 2 in Mathematics

2007-01-11 04:16:56 · 10 answers · asked by Anonymous in Astronomy & Space

For some, That was a radia signal came from the deep space. The signal lasted within 72 seconds. This year will be the 30th anniversary. Why haven't we yet taken further steps? what kind of source did the signal has? I read Mr.Ehman's articles on this subject for many times. I am a little bit confused. I look forward to receive your answers making that phenomenon and its similars clear.

2007-01-11 04:15:57 · 5 answers · asked by THINKER 1 in Astronomy & Space

2007-01-11 04:15:29 · 6 answers · asked by Anonymous in Zoology

2007-01-11 04:14:18 · 16 answers · asked by foster0676@sbcglobal.net 1 in Mathematics

I just watched the new Superman movie and it made me think. We often launch rockets and other aircraft from the belly of airplanes, why not spacecrafts? In the 1960's we originally developed the SR-71 Blackbird to be a spacecraft not an airplane. Then when the race to the moon developed we scrapped the idea of space travel and entered the space race. Now we have returned to the idea of traveling in space and returned to the concept of the SR-71 with the sapce shuttle. I understand why we can not launch it from a horizontal position on the ground, but why can't we launch it from an aircraft at altitude with much less payload to lift-off the ground and to worry about. The only exception would be the great loss if something malfunctions and it falls to the ground? Anyone able to offer the solution?

2007-01-11 04:12:27 · 2 answers · asked by Which 1's Pink 2 in Astronomy & Space

help!!!

2007-01-11 04:11:11 · 2 answers · asked by britt77016 1 in Mathematics

stem cells from them?

2007-01-11 04:11:01 · 2 answers · asked by Anonymous in Medicine

2007-01-11 04:10:50 · 1 answers · asked by mason01 1 in Chemistry

how do buildings perform energy efficiently? i need details about hybrid systems coming up newly to reduce the heat in buildings, to maintain good quality of air inside a building and related stuff. Other than mechanical ventilation, could natural air be used in cold climates? but not increasing the heating load inside!

2007-01-11 04:09:28 · 2 answers · asked by anupsekar2000 1 in Engineering

2007-01-11 04:07:17 · 16 answers · asked by jdbeauloye 1 in Engineering

This guy is 4 years younger than me (30, 33) so I've been dreading pursuing him for fear of rejection. On top of it all, last nite in my dream, we finally went out on a date and when I told him how old I was, he was shocked, promptly turned and walked away.

2007-01-11 04:06:57 · 24 answers · asked by Anonymous in Other - Alternative

I am looking for definition, explanation and the concept of Competitive Exclusion Principle. I assure that It is related to biology but I know nothing about it.

2007-01-11 04:05:54 · 2 answers · asked by Impiger 4 in Biology

I heard if we remove the x and y term first by a translation, then it would be easier for us use another rotation to get a standard equation of a conic, e.g. hyperbola, parabola or ellipse, as it would save us from doing completing squares.
However, I don't understand why a translation to remove x and y terms helps. What is the underlying working or deduction suporting this?
What I think is that based on what I heard, for any ellipse, hyperbola or parabola, as long as they are in their standard positions, then no matter how much or how many times they rotate, there will not be any x or y term.
Well, this works for ellipse and hyperbola, as the rotation is performed by putting x = x ' cos@ - y ' sin@ and y = x ' sin@ + y ' cos@, after substituting, there will just be x^2, y^2, xy and a constant term. There is no x or y term.
But for an ellipse, y^2=4ax, after putting x, there will be x and y terms.
My question is whether what I have just said is correct and how the translation helps?

2007-01-11 04:04:39 · 1 answers · asked by Henry 1 in Mathematics

In an election the winning candidate had 220 more votes than the loser. If 810 votes were cast in all, how many votes did each candidate recieve?

Any help would be great

2007-01-11 04:04:37 · 18 answers · asked by bkm_71csi 3 in Mathematics

Let R = {x,t }, S = {q,t,y }, and T = {t,p,y,v,x },

1.) y ∈ S ∩ T?

2.) x ∈ S ∩ T?

What does this actually mean? Is Y the element of S and intersects T? an or The elements of S intersect T? if so #1 is False, and #2 is True... Could someone give clarification. I am not understanding my book.

2007-01-11 04:03:26 · 5 answers · asked by C 2 in Mathematics

2007-01-11 04:02:53 · 10 answers · asked by Anonymous in Medicine

I need to figure both a Electric Heater and Gas Heater (Natural Gas). What Watt Electric Heater and what BTU Gas Heater should I get for this size shop....How do I calculate this.

2007-01-11 04:01:54 · 6 answers · asked by Biged 1 in Engineering

2007-01-11 04:01:37 · 6 answers · asked by Anonymous in Mathematics

2007-01-11 04:01:22 · 3 answers · asked by Anonymous in Chemistry

In addition to personal checks, name two other places where writing amounts in words is necessary?

2007-01-11 04:01:07 · 3 answers · asked by mshairstylinchic 1 in Mathematics

2007-01-11 04:00:47 · 21 answers · asked by A maggieG 1 in Astronomy & Space

2007-01-11 04:00:32 · 5 answers · asked by adam g 2 in Biology

If you alphabetized the word names for the numbers one to one million what would be the last name in the list? Its starts with the letter "T".

2007-01-11 04:00:08 · 5 answers · asked by mshairstylinchic 1 in Mathematics

2007-01-11 03:59:56 · 8 answers · asked by Anonymous in Chemistry

...if so how...?

2007-01-11 03:56:29 · 23 answers · asked by Anonymous in Biology

We need to make a model of gas planet, Uranus. I'm looking for something other than a styrofoam ball to represent the gaseous planet. The planet looks blue-green from the gases. Any ideas?

2007-01-11 03:54:42 · 4 answers · asked by HJRV 2 in Astronomy & Space

I'm going to try this again - I've asked twice, and have yet to get any information I'm looking for. I request that you not answer if all you're going to do is put down what trans-fats do/cause.

I'm looking for experiments, studies, medical research that brought the medical community to know about trans-fats.
I'm really interested in how members of the scientific and medical world came to the conclusions that they did. What studies were done? How many studies? In your opinion, were they fair and scientifically sound?

I've especially gotten interested in this after seeing some other points of view, for example:

http://www.junkscience.com/index.php?opt...

Trans-fats may be horrible for you, but somewhere out there someone else must want to know how conclusions were reached without just believing... Thank you for the input!

2007-01-11 03:54:31 · 2 answers · asked by country_girl_in_a_city 2 in Medicine

2007-01-11 03:52:38 · 5 answers · asked by Anonymous in Mathematics