Science & Mathematics - 8 December 2007

2007-12-08 21:37:04 · 3 answers · asked by wolffromthenothing 2 in Astronomy & Space

In a comparison of two radioisotopes, isotope A requires 15.0 hours for its decay rate to fall to 1/16 its initial value, while isotope B has a half-life that is 2.5 times that of A. How long does it take for the decay rate of isotope B to decrease to 1/32 of its initial value?

2007-12-08 21:35:51 · 2 answers · asked by mceb 1 in Chemistry

2007-12-08 21:21:58 · 15 answers · asked by Anonymous in Zoology

im no brainiac, but if an estimated 96% of our universe is dark, or unaccounted for, why would anyone think they could account for it?

How can science say, on one hand, "density or gravity can be so intense that it can bend light, and bend time" and on the other hand legitimately agree on and publish a size and age of the universe?

thats like me saying "it might rain in new jersey january 24, the year 5000" and then i prove it. i dont get it

2007-12-08 21:13:57 · 15 answers · asked by gasket300 3 in Astronomy & Space

2007-12-08 21:12:10 · 10 answers · asked by Farhana A 1 in Geography

2007-12-08 21:11:06 · 8 answers · asked by Nat 1 in Botany

Then why do so many Doctors advise so many people to take it for almost everything, isn't it either you need medication or you don't? Surely it is not right to recommend medication of any kind where for instance a cup of warm milk and honey will do the job just as well and even worse to recommend pain killer, however mild, when there is a remotest chance it will defer "very early symptoms" of a more serious illness and who except God himself can be absolutely sure on that point?

2007-12-08 20:27:38 · 3 answers · asked by robert j 1 in Medicine

I know that Chihuahuas and Great Danes share the scientific name Canis familiaris.

2007-12-08 20:25:35 · 6 answers · asked by pantheraleo2007 1 in Biology

means we can't produce life .. that is one thing that deprives from being God... any explanation

2007-12-08 19:42:38 · 8 answers · asked by sandeep m 6 in Biology

Before time was measured in seconds, minutes, and hours were there any other forms of time measurement?

Apparently the first people to subdivide time where the Egyptians around 2000bc.
So were there forms of time measurement that sprung up throughout history that have since died out, or did all time measurement spread across the world from Egypt?

2007-12-08 19:36:49 · 9 answers · asked by basisdnb 1 in Physics

Suppose that n is a positive integer, and a, b are positive real numbers with a+b=2.
Find the smallest possible value of 1/(1+a^n) + 1/(1+b^n).

2007-12-08 19:34:34 · 6 answers · asked by Answer Seeker 1 in Mathematics

The answer is 4.34 x 10^3, i don't know how to get to this answer, i have tried so many things maybe i am just over complicating it but please help.

2007-12-08 19:29:57 · 5 answers · asked by Anonymous in Chemistry

2007-12-08 19:27:59 · 19 answers · asked by Anonymous in Earth Sciences & Geology

Here's the equation:

Zn + 2HCl ---> ZnCl2 + H2

The first two is a regular number and the other two 2's are supposed to be subscripted.

Would that make it 44.8 L of hydrogen?
It's OK to assume STP on this, according to my teacher.
Since it's H2, which would be 2 moles of hydrogen, and one mole = 22.4 L, it's 44.8 L.

Did I do that right?

2007-12-08 19:24:16 · 2 answers · asked by Anonymous in Chemistry

I need a scientific invention created by a scientist. Had to be created in 1823. Thank - you.

2007-12-08 19:19:59 · 1 answers · asked by Anonymous in Other - Science

2007-12-08 19:09:03 · 2 answers · asked by Anonymous in Weather

2007-12-08 19:07:39 · 26 answers · asked by sheilamfoxx 1 in Mathematics

2007-12-08 19:03:35 · 5 answers · asked by Anonymous in Physics

I'm asking this in the engineering area because the whole story focused on engineering morals and ethics. If whoever is responsible for deleting this question could PLEASE email me as to WHY you are, I would greatly appreciate it. What part of the ToS is being violated?

Anyway, back to the question: the moral of the story was "making the machine user-friendly ruined the company," or something like that. The engineers had added a LED display welcoming users into the machine but it also ended up alerting them of an error in the replication process....

2007-12-08 19:03:13 · 1 answers · asked by John 1 in Engineering

as untrustable / idiots / brainless that carries with them from answer to answer?
So that way we (the people who ask questions) can more readily set a limit of the credibility to those that answer our questions.
I am so tired of the 'copy and pasters' wikipedia quoters who think that wikipedia is the only credible source of info (it's not. its rife with errors and opinion)
And the schmucks with persistent dumb off topic or completely brainless responses.

2007-12-08 19:03:01 · 4 answers · asked by noneya b 3 in Astronomy & Space

2007-12-08 18:39:48 · 2 answers · asked by Anonymous in Chemistry

Tell me a little bit about gamma rays including frequency, wavelength, ect. What would be a good opening sentence for a report about gamma rays?...Something that would sound good and catch peoples attention.

2007-12-08 18:31:33 · 12 answers · asked by Anonymous in Astronomy & Space

2007-12-08 18:03:49 · 5 answers · asked by mohammed a 1 in Parapsychology

Simply put:

Find x in:
10^x+3 = 6^2x

2007-12-08 18:00:51 · 2 answers · asked by N.M.M.P.P.I. 2 in Mathematics

We are having a thundersnow and lightning storm right now, so I need to know.

2007-12-08 18:00:28 · 2 answers · asked by personalstar 3 in Weather

TRUE or FALSE questions:

1. phospholipid molecule has a non polar, water-insoluble head attached to a long polar, soluble tail.

2.the fluid mosiac model describes the plasma membrane as a structure that is a liquid and very rigid.

3.eukaryotic plasma membranes can contain cholesterol, which tends to make the membrane more stable

4. transport proteins span the cell membrane, allowing the selectivety permeable membrane to regulate which molecules enter and leave the cell.

5. proteins at the inner surface of the plasma membrane attach the membrane to the cell's support structure, making the cell rigid.

thanks alot!!!

2007-12-08 17:47:40 · 4 answers · asked by john Smith 2 in Biology

can anyone help me with that? its for my homework

2007-12-08 17:44:50 · 1 answers · asked by dudewheresmycar86 2 in Geography

Can this Junk DNA eventually began to group together and create more helix's besides just the double helix? If so, would we be able to use more of our brain than 10 to 15%?

2007-12-08 17:41:37 · 5 answers · asked by Anonymous in Other - Science

Can someone tell me what the big difference is between the associate degree and a bachelor’s degree in this field what is one qualified for over the other ?

2007-12-08 17:38:43 · 3 answers · asked by HmmmmmmYea 2 in Medicine

A large rectangular yard is to be laid out and fenced in, and divided into 4
enclosures by fences parallel to one side of the yard
__ __ __ __
|__|__|__|__|

If 2 miles of fencing is available, what is the maximum area (in square miles)?

2007-12-08 17:37:36 · 4 answers · asked by Anonymous in Mathematics