Science & Mathematics - 6 January 2007

how long have all kinds of zebras existed?
where is it that they started existing?

2007-01-06 16:18:10 · 1 answers · asked by zamb 2 in Zoology

2007-01-06 16:17:22 · 16 answers · asked by (: 3 in Physics

2007-01-06 16:16:08 · 11 answers · asked by Anonymous in Biology

2007-01-06 16:15:46 · 4 answers · asked by (: 3 in Physics

Also, how much of the oxygen delivered via nasal cannula is breathed in and how much is not? Does a person on 2 liters oxygen really get that much in?

2007-01-06 16:15:40 · 10 answers · asked by a5m5s5 1 in Medicine

We're trying to figure out what sound penguins make, how they communicate. Do they have voices, or do they communicate by making sounds?

2007-01-06 16:14:05 · 13 answers · asked by Joe S 1 in Zoology

2007-01-06 16:11:01 · 6 answers · asked by richard 2 in Physics

A train stops for equal amounts of time at 4 stations bewtween A and B which are 40 km apart. THe traveling time between these two points is 20 minutes. At most how long can the train spend at each station if it is to average at least 60km/hr for the entire trip including stops.



how do you do this problem?

2007-01-06 16:10:40 · 8 answers · asked by lauta 2 in Mathematics

2007-01-06 16:09:33 · 4 answers · asked by Anonymous in Physics

2007-01-06 16:06:17 · 6 answers · asked by Anonymous in Earth Sciences & Geology

why is an adequate supply of protienin the diet particularly necessary during the early stages of human development?

2007-01-06 16:05:24 · 1 answers · asked by Hally berry 3 in Biology

For example liquid methane, liquid hydrogen, or any other liquid that requires a different temperature than water?

2007-01-06 16:04:54 · 11 answers · asked by AngryHippy 2 in Biology

it is 2.5 HP @5600 rpm the only thing I can think of would be to use 10 12vdc bateries. is there any way i can power it from a 120vac 15amp outlet.

2007-01-06 16:04:52 · 9 answers · asked by cronos51101 5 in Engineering

The notion of a parallel universe is gaining in popularity within the scientific community; what do you think? (is it possible, and if so, what would it be like?)

2007-01-06 16:03:42 · 11 answers · asked by Josephus 4 in Astronomy & Space

2007-01-06 16:03:22 · 1 answers · asked by ruly y 1 in Chemistry

2007-01-06 16:01:59 · 4 answers · asked by Anonymous in Biology

how to find if ax+by+cz+d=0 is an equation of a line or a plane.

2007-01-06 16:00:52 · 5 answers · asked by askance 4 in Mathematics

I think it is an atmospheric device. Who has it, who is likely to use it? How best to deal with its effects?

2007-01-06 15:55:42 · 10 answers · asked by Anonymous in Other - Science

Shouldn't we just call it grabbity since it grabs us and pulls us down?

2007-01-06 15:48:09 · 10 answers · asked by pillabrut 2 in Physics

2007-01-06 15:45:59 · 4 answers · asked by jd a 1 in Medicine

Rolf sells a daily newspaper for $.32.It costs him $.23 for a newspaper.What profit does he make if he sells 94 newspapers?
[Equations]

2007-01-06 15:42:24 · 7 answers · asked by Ariana 2 in Mathematics

what source of errors are compensated by using internal standard? and difficulties arise in using an internal standard method of quantitation for essential oil

2007-01-06 15:42:13 · 2 answers · asked by LamB 1 in Chemistry

2007-01-06 15:41:38 · 5 answers · asked by wrichard1 3 in Biology

2007-01-06 15:41:36 · 15 answers · asked by Hotcakes 3 in Zoology

2007-01-06 15:40:33 · 4 answers · asked by jmarasco58 1 in Geography

2007-01-06 15:37:03 · 9 answers · asked by richard 2 in Physics

I need anyone's help. This is my dream but sometime's I feel as if it is unobtainable due to my less than great GPA . Any advice? I'm in a bunch of hard classes this semester and I can't get the motivation to study. I mean - I will. I know I will be in the library tomorrow studying. But basically, I am not efficient when I study. I try but I can't concentrate HARD. OR i am efficient but then take a 5 hr long break.

I just need advice on getting in. please. any kind of help in studying/motivation/anything. Please

2007-01-06 15:36:38 · 4 answers · asked by ashley r 1 in Medicine

2007-01-06 15:36:34 · 12 answers · asked by hs_jha 3 in Astronomy & Space

6lb. 8oz.
- 4lb. 9oz.



yeah im not good at that whole converting thing and im helping my little sister so yeah and please dont put anything like "she can do her own homework" ok or else i will report abuse

2007-01-06 15:33:33 · 6 answers · asked by kelly 2 in Mathematics

i have a presentaion about the muscular system and I have to present for like 30 minutes minumum. I have to fucuos on functions and diseases i was wondering if anyone has any website tat can help me!

2007-01-06 15:24:34 · 3 answers · asked by amin a 1 in Biology