Science & Mathematics - 26 November 2007

2007-11-26 15:22:32 · 10 answers · asked by Anonymous in Astronomy & Space

Arrange the acids
I) phosphorous acid (H3PO3),
pKa1 = 2.00;
II) hydrogen selenate ion (HSeO-4 ),
pKa = 1.92;
III) selenous acid (H2SeO3), pKa = 2.46;
V) phosphoric acid (H3PO4), pKa = 2.12;
in increasing order of strengths.
1. Cannot be determined
2. IV, III, I, II
3. III, I, IV, II
4. IV, I, III, II
5. None of these
6. II, I, IV, III
7. III, IV, I, II
8. II, I, III, IV
9. II, IV, I, III
10. II, III, I, IV

2007-11-26 15:18:58 · 3 answers · asked by GinRum 1 in Chemistry

2007-11-26 15:18:10 · 9 answers · asked by Gabriel E 2 in Astronomy & Space

12-6) Your doctor's scale uses a slidable weight on an arm to balance your weight. These weights are obviously much lighter than you are. How does this work?

Please help, thanks!

2007-11-26 15:17:49 · 3 answers · asked by Kiwikahuna 2 in Physics

also, what what is the process of volcanic eruption. how is it part of our ever changing Earth?

2007-11-26 15:15:11 · 1 answers · asked by ash 1 in Earth Sciences & Geology

Place three wooden dowels with different diameters on lumps of clay. Put a heavy book on top of each dowel. Which dowel sinks deepest into the clay, the one with largest diameter or the one with smallest diameter? Please explain it.
Thanks!

2007-11-26 15:14:43 · 3 answers · asked by Anonymous in Physics

Which of the following statements about water-soluble vitamins is NOT true?
An example is vitamin A, found in yellow colored vegetables.
An example is folic acid, found in liver.
An example is riboflavin, found in milk products.
They are continuously excreted with the urine.


From ingestion to elimination, which list is NOT in the correct order?
mouth, pyloric sphincter, duodenum, cecum
esophagus, stomach, jejunum, ileum
pharynx, stomach, cecum, ileum
esophagus, pyloric sphincter, jejenum, ascending colon

2007-11-26 15:14:33 · 2 answers · asked by Anonymous in Biology

A rocket is launched vertically and it runs out of fuel at an altitude of 1000 ft. above ground level, when its velocity is 78.4 ft./sec. How long will it be before the rocket again is at an altitude of 1000 ft. above ground level?


Please, please, PLEASE at least give me the equation. Setting up the equation is what I have the most trouble with. :(

2007-11-26 15:11:32 · 3 answers · asked by 2 days after my B day :) 2 in Mathematics

Biology help needed, I'm stuck on this one problem. thanks a lot.

2007-11-26 15:11:26 · 3 answers · asked by Dimples 5 in Biology

i always wonder why the sky is blue and why the ocean is blue and why water is clear??? does anyone know why?

2007-11-26 15:07:40 · 9 answers · asked by Anonymous in Earth Sciences & Geology

it wont hurt the sun cuz its so hot, but wouldnt that be nice if we could do that?

2007-11-26 15:05:59 · 28 answers · asked by canyou-feelit 2 in Astronomy & Space

2007-11-26 15:05:59 · 9 answers · asked by ? 2 in Mathematics

after how many hrs will the faster car be 42miles ahead of the slower once?

2007-11-26 15:03:58 · 7 answers · asked by kpd123 1 in Mathematics

2007-11-26 15:03:57 · 4 answers · asked by Anonymous in Geography

I tried solving it using the quadratic equation form, but to no avail. Is this problem solvable and if yes then how do I solve it. Thanks a lot.

2007-11-26 15:02:29 · 3 answers · asked by Mpnop684 2 in Mathematics

i went on google already and did not get any good results
i dont have a TI 85
and i heard you can go online,but i dont know any websites
my homework is due tomorrow
please help me
thanks in advance

2007-11-26 14:53:31 · 12 answers · asked by Bonita 4 in Mathematics

2007-11-26 14:52:34 · 2 answers · asked by Anonymous in Mathematics

Is there a program I can use to find out what messages, if any, are contained behind the sound of the ocean on a subliminal CD I purchased

2007-11-26 14:49:29 · 4 answers · asked by Anonymous in Other - Alternative

Wilted lettuce can be made crisp agan if it is allowed to soak in a bowl of water for a few minutes. How does this idea relate to the process of osmosis


explain how it relates to the process of osmosis please ^^

thanks for your help!!

2007-11-26 14:48:32 · 1 answers · asked by JoChan 2 in Botany

electron carriers that pass energized electrons on to the electron transport chain....

2007-11-26 14:47:06 · 3 answers · asked by Nicki 2 in Biology

A new dwarf planet (a term we'll define in the next unit) is discovered beyond Neptune. A tiny moon is discovered to be orbiting it at a constant distance of 4.9x10^8 m from the planet's center, with a period of 1.0x10^7 s. What is the planet's mass? [Use SI ("standard" or "metric") units.]

2007-11-26 14:45:25 · 2 answers · asked by Anonymous in Astronomy & Space

I am looking to make your minds work hard so please be as creative and original as possible with your answer!

2007-11-26 14:41:19 · 13 answers · asked by Nianna L 1 in Other - Alternative

2007-11-26 14:41:07 · 2 answers · asked by malik A 1 in Earth Sciences & Geology

i have 2 empty spaces on my crossword puzzle about cells

15.This molecule makes up he framework of the lipid bilayer.
2. The lipid ____ forms the frame work of the cell membrane.

if you know these answers please let me know thanks

2007-11-26 14:38:56 · 4 answers · asked by katlin_104 1 in Biology

Is the world really going to end in 2012?At first,I didn't believe it but now it's everywhere and I don't know.Its kind of hard to believe if its over a little calendar.Plus,how can it be true if there all different types of dates the would is supposed to end.

2007-11-26 14:36:05 · 8 answers · asked by Hardy Girl For Life 1 in Earth Sciences & Geology

The equation is squareroot of 3t-14 and plus T=6
name any extraneus solutions of the equation.
what is the solution of the equation?

2007-11-26 14:35:20 · 5 answers · asked by Anonymous in Mathematics

I am doing a double degree at the moment , Chemistry Sc and Chemical Eng . What kind of extra job opportunities can I get with a double degree compared to just Chemical Eng by itself. Will the double degree be a bonus when I look for employment ? I have an option of dropping out the Chemistry science , so i wanted some of your opinions . The difference is 1 extra year of study . Thanks a lot ( Im in Australia btw )

2007-11-26 14:34:06 · 4 answers · asked by Anonymous in Engineering

In cellular respiration, series of reactions that break down glucose and produce ATP....
______ energizes electron carriers that pass energized electrons on to the electron transport chain.

---
What is the step or name of that process? Please help!

2007-11-26 14:31:50 · 5 answers · asked by Anonymous in Biology

7<1-x<13
i'm confusing on this .

2007-11-26 14:28:47 · 7 answers · asked by nirvan5a 2 in Mathematics

a.) What is the degree of this polynomial ?

b.) How many terms does this polynomial have ?

c.) What is the coefficient of the third term ?

2007-11-26 14:28:28 · 3 answers · asked by mike o 1 in Mathematics