Science & Mathematics - 21 December 2007

Well Since i'm sick I had to wake up around 3 in the morning to get up and go to the bathroom. While laying in my bed I glanced toward my door and saw a white figure (not really the shape of a body, but kind of a wide straight figure). I simply got up thinking I was just seeing things and moved my way towards the door.

When i got to the door I tripped over something and glanced at the floor to see what it was. Down at my feet I saw a really light white light sitting there. I know for a fact that it wasn't a light in my room, because during the night I make my room as dark as possible, by shutting off all things that make lights..and since my house has alot of property, we don't have neighbors to give off house light.

I know that this wasn't an ordinary ghost, because I've seen alot of those! For some reason this one was different, because it didn't give me a fear of happiness but a good feeling.

Any ideas what this was?

2007-12-21 02:54:43 · 5 answers · asked by Anonymous in Paranormal Phenomena

I am doing a science fair project on rusting nails. I am going to put 1 nail in a jar containing water, salt water, bleach and vinigar to see which liquid will make the nail rust faster. My question is, should I put the lid on the jars or just leave them open?

2007-12-21 02:53:56 · 4 answers · asked by jaydkast 4 in Chemistry

A particular base triplet in the coding strand of DNA is TCA. What would be the triplet in the complementary strand of DNA?

A. AGT

B. TCA

C. AGU

D. GAT

E. CAT

The problem associated with replication of DNA proceeding in the 3’ > 5’ direction only, is solved by the use of:

A.Complimentary base pairing

B.Replication forks

C.The enzyme that unwinds the DNA, helicase

D.Okazaki fragments

E. The semiconservative replication of the molecule


What type of inheritance pattern is exhibited in a genetic cross if the phenotypes of two unique homozygous parents (AA and aa) are different from the phenotype of a heterozygous (Aa) offspring?

A. Pleiotropy

B.Epistasis

C. incomplete dominance

D. multiple alleles

E. selinkage

2007-12-21 02:53:06 · 3 answers · asked by Anonymous in Biology

I saw a quiz where you had to derive the total number of gifts received when the "12 Days of Christmas" is sung in it's entirety. I read an explanation but don't understand it!
The correct answer is 364 and on the 12th day a total of 78 items are received. Can someone please explain this in the simplest possible terms please? Remember we are counting items and not gifts therefore 5 gold rings is 5 items. Please don't post the Wikipedia thing....I don't understand that either!

2007-12-21 02:49:42 · 6 answers · asked by thequestioner 2 in Mathematics

2007-12-21 02:44:21 · 8 answers · asked by Anonymous in Chemistry

I need help on this one math question please

A right triangle is drawn with one of the non-right angles labeled with a measure of B degrees. The side opposite of the angle labeled b degrees is 12 units. The side adjacent to that same angle is labeled 15units. Find the value of b to the nearest hundredth. Show all work.

2007-12-21 02:41:38 · 5 answers · asked by Anonymous in Mathematics

i know that it's rarely ever pure MDMA and that it's often cut with ephedrine and amphetamines, but is heroin really ever present? i've never done E and never will, but my husband and I were discussing it last night and neither of us know. I tried getting on Erowid.org, but the site appears to be down and I didn't find much info elswhere.

2007-12-21 02:40:38 · 3 answers · asked by SpiderDijonRevisted 3 in Chemistry

2007-12-21 02:40:11 · 12 answers · asked by Anonymous in Astronomy & Space

Let f(x)=ax^5+bx^4+cx^3+dx^2+ex+1 be a polynomial. Also assume the f(1)=4 and f(2)=11. Additionally, all the coefficients are integers. Prove that the equation does not have a solution that is an integer. here is the full question yahoo cut some of it off. I need all the work with it to

2007-12-21 02:38:46 · 1 answers · asked by Anonymous in Mathematics

I saw a listing online of all the names of the different demons. What would have happened if I had said one aloud?

2007-12-21 02:37:49 · 11 answers · asked by Cesaria Barbarossa 7 in Paranormal Phenomena

In a dihybrid cross (like the ones Mendel performed with the pea plants), if the two traits of interest are controlled by genes found near each other on the same chromosome, then the F2 generation would have

A. contained no individuals that were heterozygous at both loci

B. contained only individuals that were heterozygous at both loci

C. contained 4 phenotypes in the following ratio: 9:3:3:1

D.deviated from the predicted ratio of 9:3:3:1

E.none of the above are correct

2007-12-21 02:37:15 · 2 answers · asked by Anonymous in Botany

Not by like throwing knives across the room but coming into you or something.

2007-12-21 02:36:42 · 34 answers · asked by Cesaria Barbarossa 7 in Paranormal Phenomena

In humans, red-green colorblindness is a sex-linked recessive trait. If man is colorblind, which of the following must be true?


A.His father is colorblind.

B.His mother is colorblind.

C. Both his parents are colorblind.

D. His father carries at least one colorblind allele.

E. His mother carries at least one colorblind allele.

2007-12-21 02:35:39 · 3 answers · asked by Anonymous in Biology

I have read Newscientist magazine today and it says this will be ''a cocktail of recycled human urine, sweet and rat pee''. How do they mean? isn't this urine mean the real urine we all know?

2007-12-21 02:32:16 · 6 answers · asked by Essien 3 in Astronomy & Space

i need help

2007-12-21 02:31:24 · 3 answers · asked by Anonymous in Mathematics

I have an 81% in the class and I just got a 55% on my final exam. The final exam is worth 20% of my grade. Does anyone know what my final grade will be with the information? Thanks

2007-12-21 02:29:28 · 10 answers · asked by Dana M. 3 in Mathematics

I don't understand SNR. When I read Wiki (ofcourse the best reference on earth ;) ) - It saids that it is the ratio of meaningful information to noise. I need to use SNR with imaging modalities. And this is confusing because many things happen during the imaging process. For example a CT or MRI scanner has very complicated techniques to reconstruct the picture from the basic signals. It may use filtering, averaging, back projection, interpolation -who knows what more... but the original signal- information is manipulated: So at what stage should you measure SNR if you want it to reflect the qualitity of your imaging modality?

Another strange thing is that the SNR seems to reflect more what I am measuring rather than the measuring apparatus itself. For example if I measure velocity with something- the faster the thing goes the more signal I may get: so a higher SNR. -but this says nothing about the measurement apparatus itself.

Please help me to understand SNR.

2007-12-21 02:28:44 · 4 answers · asked by ? 3 in Physics

and what about room temperature water?

2007-12-21 02:25:55 · 7 answers · asked by patrick m 2 in Chemistry

No number is writeen in writing a formula when the valence numbers of both the metals and nonmetal in a compound are 1.


If you do know the answer, could you please explain this to me. I have absolutely no idea what it means?

2007-12-21 02:24:41 · 6 answers · asked by Kattie 1 in Chemistry

And there's nothing there(not hot solid/liquid iron), will I float? Cause of that's the center of gravity. The EXACT earth's center of gravity will make me float cause I'm pulled to every sides and angles.

2007-12-21 02:17:48 · 11 answers · asked by Anonymous in Physics

hematology

2007-12-21 02:17:39 · 1 answers · asked by ann 1 in Medicine

2007-12-21 02:16:39 · 3 answers · asked by CYNTHIA L 1 in Medicine

i know that this is going to sound really weird but i keep having premonitions that aliens are going to come to earth soon when we least expect it ; does anyone have the same thoughts. no i am not drunk i am very sober

2007-12-21 02:13:34 · 20 answers · asked by DeShawn L 1 in Astronomy & Space

Why isn't my pop- up blocker working on these annoying 'GAP' video splashes now gracing the pages of this forum?
Are there setting I can apply to knock them out, or am I relegated to just dealing with them over and over every time I 'refresh' the page to view and answer new questions?
This is well on its way to making me crazier than usual!!!

2007-12-21 02:11:26 · 8 answers · asked by Bobby 6 in Astronomy & Space

2007-12-21 02:07:21 · 5 answers · asked by Anonymous in Mathematics

2007-12-21 02:02:11 · 13 answers · asked by Anonymous in Mathematics

2007-12-21 02:02:06 · 1 answers · asked by selvakumar 1 in Engineering

During colonoscopy the doctor scraped his lining, which caused his colon to constrict & not allowing any gas to escape. Doctor never called after colonoscopy - we took him to ER two days after colonoscopy. He had to have surgery - they removed 2 parts of his colon (the back end had a small rupture due to build up of gas) . Will be wearing a bag for the next 3 months for his feces, and then have to go back in to get everything reattached. Do we have a case for medical malpractice? We're pretty upset - can't think too straight, but not happy with whole situation. He'll be in hospital for the holidays, had to cancel upcoming trips, and he'll need some major recuperation time before he feels okay.

2007-12-21 02:01:17 · 16 answers · asked by cateyes 1 in Medicine

How did the water evaporate?

How are scientists going to beat the radiation problem to colonize?

I don't think the situation on mars can be over come for long term human existence.

2007-12-21 01:57:47 · 16 answers · asked by Ophiuchus 3 in Astronomy & Space

If The interior of Venus is composed of a central iron core and a molten rocky mantle, similar to the composition of Earth, then why isn't Venus projecting a magnetic field too?

A day on Venus (243 Earth days) is longer than a year (224.7 Earth days). The rotation is also opposite from that of Earth, with the Sun rising in the West.

Does the direction and rate of rotation have to do with the lack of a magnetic field?

I don't understand...

I have a Mars Question too...

2007-12-21 01:51:41 · 11 answers · asked by Ophiuchus 3 in Astronomy & Space