Science & Mathematics - 14 August 2006

2006-08-14 18:35:34 · 11 answers · asked by bhott 1 in Earth Sciences & Geology

Let g(x) be a function such that g(x+1) + g(x-1)=g(x) for every real x.Then for what value of p is the relation g(x+p)=g(x) necessarily true for every real x?
(a) 5
(b) 3
(c) 2
(d) 6

2006-08-14 18:35:15 · 4 answers · asked by Rohit C 3 in Mathematics

Kr-73 (Half-life = 27s), Kr-74 (Half-life = 11.5 min), Kr-76 (Half-life = 14.8 hr), Kr-81 (Half-life = 2.1 x 10^5 yr)

Pleas include all steps

2006-08-14 18:34:50 · 5 answers · asked by Nate-dawg 2 in Chemistry

2006-08-14 18:33:57 · 5 answers · asked by hlr 1 in Chemistry

2006-08-14 18:32:57 · 21 answers · asked by lenin m 1 in Astronomy & Space

2006-08-14 18:22:56 · 3 answers · asked by wlkyd 1 in Physics

2006-08-14 18:22:48 · 21 answers · asked by kamja801 1 in Biology

2006-08-14 18:22:19 · 11 answers · asked by Jitendra 2 in Physics

2006-08-14 18:21:17 · 7 answers · asked by nelson a 1 in Engineering

i think we would see the future if the telescope is good enough.. :P

2006-08-14 18:19:50 · 16 answers · asked by Drastic P 1 in Astronomy & Space

2006-08-14 18:19:09 · 3 answers · asked by wlkyd 1 in Physics

How long does it take for 87.5% Kr-73 (half-life=27 s) to decay? Please write out complete steps.

2006-08-14 18:18:14 · 3 answers · asked by Nate-dawg 2 in Chemistry

Between 1992 and 1999, you added approximately 15 stamps per year to your collection. In 1997 you had 130 stamps. Find an equation that represents the number of stamps in your collection, y, in terms of the year, t. Let t=0 correspnd to 1992.

2006-08-14 18:14:42 · 5 answers · asked by sonovabeeech 1 in Mathematics

2006-08-14 18:14:32 · 4 answers · asked by mel 1 in Weather

This was inspired by an article on August 13, 2006 entitled "Astronomers Struggle To Define Planet" by the Associated Press.

2006-08-14 18:13:55 · 4 answers · asked by glorywindow 1 in Astronomy & Space

I don't want to hear that it's an intractable problem and cannot be solved. I want one of you smart people out there to DO it. Or at least give us your best strategy/theory/idea.

PS It will earn you 10 points. Remember, protractor and straight-edge only.

2006-08-14 17:58:18 · 8 answers · asked by iandanielx 3 in Mathematics

I wounder how you make dry ice at home ?

2006-08-14 17:57:24 · 17 answers · asked by keithletterlou 1 in Chemistry

2006-08-14 17:57:07 · 5 answers · asked by Anonymous in Geography

I live in the desert, and I usually wear short sleeves. Someone told me that, like the Bedouin in the Middle East, I should wear long sleeves and basically cover up when the outside temperature is higher than my body temperature, thereby insulating me from the higher outside heat. I know I feel cooler when I wear short sleeves and in general less clothing, but his logic seems to make sense.

2006-08-14 17:55:05 · 14 answers · asked by teacuppu poodoru 2 in Physics

1. Must involve exactly two distinct elements or compounds, of any state (solid, liquid, or gas).

2. Must NOT require a catalyst in any form, chemical, thermal, or otherwise. The reaction must happen at room temperature.

3. Must exist in some abundance. e.g. californium and kryptonite is not a good answer.

I WILL give the best answer to someone that lists credentials, even if its "science buff".

If it turns out to be toothpaste and baking soda, or something equally accessible, feel free to PM me the answer to keep children from blowing their hands off. I'll still make sure you get 10 points =D

2006-08-14 17:54:11 · 2 answers · asked by Anonymous in Chemistry

2006-08-14 17:54:06 · 3 answers · asked by MB 2 in Biology

Here 'alpha' is denoted by '@'.

2006-08-14 17:53:10 · 4 answers · asked by Anonymous in Mathematics

A rectangular floor is fully covered with square tiles of identical size.The tiles on the edge are white and the tiles in the interior are red. the number of white tiles is the same as the number of red tiles. a possible value of the number of tiles along one edge of the floor is
(a) 10
(b) 12
(c) 14
(d) 16

2006-08-14 17:52:09 · 5 answers · asked by Rohit C 3 in Mathematics

I've seen double, triple and even quadruple rainbows because I live in the North where rainbows are amazing, but they are always ached one above the other on the same plane. I've never seen rainbows in different parts of the sky at the same time. Is that impossible, and if so, why...?

2006-08-14 17:51:48 · 14 answers · asked by Anonymous in Weather

Can Sedna, Quaoar, Xena or even Pluto be considered comets? After all, they all come from the Kuiper Belt.

2006-08-14 17:51:37 · 6 answers · asked by StandTall 4 in Astronomy & Space

just wondering like the whole evolutionary side of it you know

2006-08-14 17:51:08 · 16 answers · asked by Anonymous in Biology

You know what I mean by jumped right like the female is in heat and male jumps fence to have to Sex.

2006-08-14 17:49:12 · 7 answers · asked by Anonymous in Zoology

Let x-=sqrt(4+sqrt(4+sqrt(4+...to infinity.Then x equals
(a) 3
(b) (sqrt(13)-1)/2
(c) (sqrt(13)+1)/2
(d) sqrt(13)

2006-08-14 17:47:02 · 6 answers · asked by Rohit C 3 in Mathematics

meaning why no partially completed chickens or animals that have partial characteristics of chickens ? But only 100% completed chickens !

2006-08-14 17:41:18 · 13 answers · asked by toni k 1 in Biology

There seems to be many in the medical community who think that serotonin regulation with SSRI's are the key to treating depression. However, many earlier drugs have proved effective in treating depression such as MAOs, tricyclics, lithium. I am not arguing here which is more effective and has the least side effects. The question is the key really serotonin regulation in the brain or is there another cause to depression? I feel drug companies push SSRI's and say it is a chemical imbalance, because they sell chemicals and only their chemicals work.

There has been a study published that agreed that SSRI's work for depression, but that study showed that SSRI's worked in the exact opposite way that the drug companies have argued. I.e., to me it is still an open question as to what depression in the brain truly is.

Some scientists now believe that depression is an auto-immune disease of the brain. SSRI's and other anti-depressant medication suppress the immune system.

2006-08-14 17:34:20 · 4 answers · asked by Michael D 1 in Medicine