Science & Mathematics - 27 January 2007

2007-01-27 08:54:24 · 5 answers · asked by CelticMoonGoddess 2 in Mathematics

2007-01-27 08:53:05 · 11 answers · asked by Anonymous in Biology

do you think we actually landed on the moon or was it a conspiracy?

2007-01-27 08:46:27 · 17 answers · asked by Anonymous in Astronomy & Space

1) x-y=5 2) 3x-y=1 3) 3x+y=-1
x+y=3 3x-y=2 9x+3y=-3

2007-01-27 08:45:54 · 3 answers · asked by CelticMoonGoddess 2 in Mathematics

Wouldn't it save millions of life if this could be done? I know this sounds silly but I was just wondering cos there are volcanoes that are just waiting to incinerate an entire population, and if there's an alternative to moving everyone out of its surroundings, especially in a metropolitan or densely populated city, I think it's worth the work.

2007-01-27 08:44:26 · 10 answers · asked by xander 5 in Earth Sciences & Geology

does anyone know any ocean animal that starts with a x? what about particle? thx!

2007-01-27 08:43:55 · 1 answers · asked by StefaniB 2 in Zoology

Please help me.

2007-01-27 08:41:17 · 14 answers · asked by Imagine, Its Contagious! 3 in Mathematics

I am setting up a battery buffered system where no wires will be longer than a couple feet. I can set this up either 12 or 24 volt.
This is a continuiously running system, however the charger will only be in use part of the time.

120v in (batt charger) > 12v or 24v batt bank > inverter > 120v out

Are inverters more efficient at higher input voltages?
This is in Alaska, is higher voltage less susseptible to cold?
Is there benifit to more storage or more volts?

2007-01-27 08:39:45 · 8 answers · asked by the prof 2 in Engineering

2007-01-27 08:39:43 · 3 answers · asked by Jared H 1 in Biology

A baseball is hit nearly straight up into the air with a speed of 39 m/s.
(a) How high does it go?
m
(b) How long is it in the air?
s

2007-01-27 08:38:47 · 6 answers · asked by nafiseh g 1 in Physics

2007-01-27 08:38:44 · 5 answers · asked by CelticMoonGoddess 2 in Mathematics

that about covers it!

2007-01-27 08:38:44 · 3 answers · asked by Anonymous in Engineering

Compute your average velocity in the following two cases: (a) You walk 90.0 m at a speed of 1.06 m/s and then run 90.0 m at a speed of 3.47 m/s along a straight track. (b) You walk for 1.00 min at a speed of 1.06 m/s and then run for 1.41 min at 3.47 m/s along a straight track.

2007-01-27 08:38:03 · 1 answers · asked by Anonymous in Physics

I am setting up a battery buffered system where no wires will be longer than a couple feet. I can set this up either 12 or 24 volt.
This is a continuiously running system, however the charger will only be in use part of the time.

120v in (batt charger) > 12v or 24v batt bank > inverter > 120v out

Are inverters more efficient at higher input voltages?
This is in Alaska, is higher voltage less susseptible to cold?
Is there benifit to more storage or more volts?

2007-01-27 08:37:35 · 4 answers · asked by the prof 2 in Engineering

2007-01-27 08:36:22 · 6 answers · asked by Anonymous in Astronomy & Space

I was looking at the information that came with my medication, and I noticed that the starting dose for children and adolescents under 70 kg is 0.5 mg/kg, or for children and adolescents over 70 kg, and for adults regardless of weight, it's 40 mg. But what about adults that are significantly under 70 kg? It seems to me that my response to medication would be a lot more similar to that of my 16-year-old sister, who's close to the same weight as I am, than, say, my dad who's well over twice my age and probably close to twice my weight. My doctor had me take only 18 mg (which still produced enough side effects that I stopped taking it after four days), but I'm curious as to why the recommended dosages for many medications seem to assume the response in adults won't be weight-dependent when it clearly will be.

2007-01-27 08:36:14 · 7 answers · asked by Anonymous in Medicine

2007-01-27 08:35:28 · 9 answers · asked by Anonymous in Astronomy & Space

2007-01-27 08:34:14 · 1 answers · asked by Anonymous in Chemistry

L1 with equation x - 7y = 14
L2 with equation 7x + y = 7

2007-01-27 08:31:28 · 7 answers · asked by CelticMoonGoddess 2 in Mathematics

80 grams of mannitol to the patient?

2007-01-27 08:31:14 · 3 answers · asked by jame2226 1 in Medicine

2H2(g) + O2(g) --> 2H2O(g) ΔH = −486.6kJ



Which of the following are true statements for the above chemical reaction ?



a) A phase change is involved


b) Two moles of hydrogen gas react with two moles of oxygen gas to
produce two moles of water vapor


c) Energy is given off to the surroundings


d) If the reaction takes place at constant volume, q and ΔH must by definition have the same value


e) ΔH for reacting four moles of hydrogen gas with two moles of
of oxygen gas is −977.2 kJ

2007-01-27 08:31:08 · 1 answers · asked by Christie 1 in Chemistry

the cost of a renting a truck is $35 aday plus .20 cent per mile. How farcan Tanya Richardson drive 1 day if she has only $80?

2007-01-27 08:30:00 · 2 answers · asked by Azumi 2 in Mathematics

What kind of thermometer would I need to buy to measure liquids such as water, milk, and soup?
I have to do a science fair project and don't know if I need a specific kind.
Could you also let me know where I would be able to buy this kind of thermometer? Thanks to everyone in advance!

2007-01-27 08:29:19 · 2 answers · asked by ♥Pyar Ki Pari♥ 4 in Other - Science

2007-01-27 08:25:39 · 9 answers · asked by Anonymous in Geography

in the year 1995. what was the percentage increase from 1970 to 1995?

2007-01-27 08:25:29 · 4 answers · asked by CelticMoonGoddess 2 in Mathematics

2007-01-27 08:22:35 · 5 answers · asked by Anonymous in Chemistry

The medication I started taking a few days ago has an FDA warning about a potential side effect that's only for children and adolescents. Being 20 years old I thought that wouldn't apply to me, but my doctor said that it does. But I noticed that in the clinical trials for the medication, their "adolescent" group was 12-17, and the "adult" group was 18+. There's only a 0.4% chance of this particular side effect to begin with, so I don't consider it a major risk either way, I'm just curious.

2007-01-27 08:22:12 · 1 answers · asked by Anonymous in Medicine

2007-01-27 08:18:36 · 6 answers · asked by rene t 1 in Astronomy & Space

and tell me the difference of sky and space and vaccum?

2007-01-27 08:18:14 · 3 answers · asked by sufiesidhi 1 in Astronomy & Space

2007-01-27 08:17:39 · 13 answers · asked by Lawrence 1 in Physics