Science & Mathematics - 24 November 2007

Looking for new ways to prepare wild game.

2007-11-24 09:38:05 · 5 answers · asked by James K 1 in Zoology

are located in space? How can we observe photons traveling from point A to point B?

In other words, how is it possible for a photon with no spatial dimensions to be located in space, or be said to stand in some relation to other objects in space? Is having "no spatial dimensions" the same as being "not located in space?"

How does science account for this? I know this is a tall order for an online forum, so I would love it if someone could direct me to a reliable source that would address this question.

2007-11-24 09:37:07 · 3 answers · asked by Pull My Finger 7 in Physics

Radon - 212 has a half-life of 24 minutes. Show that if you start with 96mg of radon-212 that you will have 91 mg of polonium-208 two hours later (and not 93 mg).

2007-11-24 09:35:57 · 1 answers · asked by ... 2 in Physics

Here are the options for answers:
A. Mean
B. Mode
C. Range
D. Standard Deviation

2007-11-24 09:35:26 · 2 answers · asked by Jennifer M 1 in Mathematics

2007-11-24 09:34:16 · 3 answers · asked by acheebubha 1 in Mathematics

cubic rt. (x^7y^11)

2007-11-24 09:29:13 · 4 answers · asked by Im Juzt Meh 2 in Mathematics

cubic route (108)

2007-11-24 09:27:50 · 3 answers · asked by Im Juzt Meh 2 in Mathematics

Please answer the following questions with a:
0 - no concern
1- low concern
2- medium concern
3 - high concern

Please indicate your level of concern on the following environmental issues:

Acid rain
Air pollution
Drinking water quality
Food additives
Genetically modified foods
Indoor air pollution
Ozone depletion
Pesticides
Smog
Solid waste

Thank you.

2007-11-24 09:24:29 · 3 answers · asked by totalstressor 4 in Earth Sciences & Geology

if i were in the sea and visibility was perfect. if a ship coming over the horizon, how far away would it be?

2007-11-24 09:24:11 · 5 answers · asked by chuckguy 3 in Earth Sciences & Geology

in relation to physics.

2007-11-24 09:20:00 · 1 answers · asked by diablo_blaze7 2 in Physics

Genetic recombination (in particular the exchange of genes (DNA) between homologous chromosomes) sometimes takes place in meiosis:

a. after the first cell division
b. before the DNA synthesis
c. prior to the first metaphase
d. between nonhomologous chromosomes

I thought it was c but the word "sometimes" is throwing me off. Maybe d?? I don't see anything about nonhomologous chromosomes in my book though.

2007-11-24 09:18:58 · 2 answers · asked by LJC 2 in Biology

a friend of mine has glacoma and has no insurance
and does not quallify for any type of government or
social assistance program. she is in desperate need
of surgery, she can,t see, but neeeds a doctor in the
houston area who will work out a payment program with
her. this is extremely urgent, time is of the essene,
problem got much worse in only a week, last week she
could see, she neeeds a doctor or clinic in the houston
area to work with her and allow her to work out a payment
program. somebody, a doctor, surgeon, or health care
professional, please help!! thanks and god bless.

2007-11-24 09:18:47 · 2 answers · asked by Jerry S 7 in Medicine

2007-11-24 09:15:44 · 15 answers · asked by Anonymous in Other - Science

Is there any way to solder together more than two wires in a single join such that the join is watertight?

2007-11-24 09:14:00 · 2 answers · asked by sciguy 5 in Engineering

At scholl were having a huge science fiar and i really want to win it. I would really like it if there was a chemical reaction or something that would make people say wowww.

2007-11-24 09:10:11 · 1 answers · asked by Brandon M 1 in Other - Science

Late in the twentieth century, a series of observations and theories arose, not related to the mind or consciousness, but purely on the agenda of mainstream particle physics and cosmology.From the beginning of quantum physics in the early twentieth century, physicists have found, strangely, a role in physics for human consciousness and the mind. This role has in fact been too strange for mainstream physics, which has proceeded without the mind.

2007-11-24 09:08:42 · 5 answers · asked by bhattathiry 1 in Physics

let V be a finite dimensional vector space, M and N linear subspaces of V, prove

dimM+dimN = dim(M+N) + dim(M n N)

n = intersection,


proof:
First prove the lemma
If U is a subspace of V and {u_1,..., u_k} is a base in U then there are some vectors v_1,..., v_l such that {u_1,..., u_k, v_1,..., v_l} is a base in V.

Now choose the base B in M n N. Extend it by lemma to a base Bm in M, and base Bn in N. Now prove that Bm u Bn is a base of M+N.

Let #X be a number of elements in X.
You have
dim M = #Bm
dim N = #Bn
dim (M+N) = #(Bm u Bn)
dim (M n N) = #B
and #(Bm u Bn) = #Bm + #Bn - #(Bm n Bn) = #Bm + #Bn - #B because Bm n Bn = B



does that look right, any help is appreciated

2007-11-24 09:08:20 · 3 answers · asked by Anonymous in Mathematics

2007-11-24 09:08:16 · 18 answers · asked by Anonymous in Physics

Thanks!

2007-11-24 09:06:09 · 3 answers · asked by Kellyanna 2 in Zoology

I am receiving a video-based laser return via an APD and need to take the AC referenced signal and reference it to DC so I can add the sync. I have not been successful, so far. It still goes below 0v and gets into my sync signals.

Any ideas?

2007-11-24 09:03:13 · 1 answers · asked by Warren W- a Mormon engineer 6 in Engineering

I have a problem dealing with ring isomorphism.

My question can be seen in better detail at the link below at Cramster.com:

http://answerboard.cramster.com/math-topic-5-146838-0.aspx

2007-11-24 09:01:36 · 2 answers · asked by Anonymous in Mathematics

2007-11-24 08:56:00 · 3 answers · asked by Pull My Finger 7 in Physics

On that program, (which I can't remember the name of), I saw that not only is Uranus' polar axis tilted almost to 90 degrees, but its satellites are fairly nicely arranged on the planet's equatorial plane. I knew about the polar tilt, but not the moons. I figure that somehow the planet got tilted, but why the moons? This would suggest that the whole system formed that way. But why? How? It seems contrary to the expected physics.

2007-11-24 08:54:34 · 2 answers · asked by Brant 7 in Astronomy & Space

2007-11-24 08:54:21 · 7 answers · asked by . 5 in Astronomy & Space

2007-11-24 08:53:49 · 6 answers · asked by Krystoffer W 1 in Mathematics

Do You remember the old problem about the equilateral triangle on the rails? Given are 3 co-planar parallel lines, the distance between 1st and 2nd is a, between 2nd and 3rd - b (and a + b between 1st and 3rd of course).
Please follow the link below to see a picture:

http://i219.photobucket.com/albums/cc101/Andrey_Dyukmedzhiev/2D3D.gif

Easily follows that for all a ≥ 0 and b ≥ 0 there exists an equilateral triangle, having one vertex on each line with side length:
(2/√3)*√(a² + ab + b²)

Now the 3D analog: imagine 4 parallel planes at distances a, b and c between them. Does a regular tetrahedron exist, having one vertex on each plane? If so, find its edge length.

2007-11-24 08:53:43 · 1 answers · asked by Duke 7 in Mathematics

I know that people say that it's meant to be someone walking over your future grave but does anyone know the scientific reason that this happens.

2007-11-24 08:49:32 · 6 answers · asked by Bumble 2 in Biology

write the rational expression in lowest terms

3q²-4qz+z²
---------------
q²-2qz+z²

2007-11-24 08:47:06 · 7 answers · asked by Jen1289 1 in Mathematics

I dont mean orbit but thier rotation

2007-11-24 08:45:25 · 10 answers · asked by manicmalcolm 2 in Astronomy & Space

there are 2820 cars in farmington. the ratio of intermediates to compacts is 7:5 and the ratio of compacts to full-size cars is 8:9. how many full-size cars are there?

2007-11-24 08:45:20 · 2 answers · asked by karenmp1993 2 in Mathematics