Science & Mathematics - 15 February 2007

Calcium oxalate (CaC2O4) is a slightly solubleionic compound. Write the chemical equation that represents dissolving CaC2O4 in water:

---I'm not sure if I've got this one exactly right. I think the equation of the ion-product expression of the saturated calcium oxalate is

CaC2O4(s) = Ca 2+(aq) + C2O4 2-(aq)

How do I incorporate water into this reaction? Thanks for the help!

2007-02-15 18:39:12 · 5 answers · asked by thesekeys 3 in Chemistry

I wonder why inner body of a microwave didnt spark while metallic cuttlery sparks

2007-02-15 18:37:59 · 4 answers · asked by raju_bhatnagar2003 1 in Engineering

Does photons experience friction as they r having particle nature also?

2007-02-15 18:35:33 · 10 answers · asked by rajesh bhowmick 2 in Physics

2007-02-15 18:34:55 · 6 answers · asked by kripa k 1 in Mathematics

ok, so for a short while you were a sperm inside your dad's body. Where the hell were you before that? still somewhere in your dad's body as a dormant cell? maybe your moms? I want answers. Jesus told me we are all Gods children so what about the trillions of other sperms that don't make it? are they just losers?

seriously though where the hell were you before you were born?

2007-02-15 18:33:50 · 5 answers · asked by Anonymous in Biology

deals with watts.

2007-02-15 18:32:19 · 4 answers · asked by dfgfdg f 1 in Engineering

In an extraction experiment with water and diethyl ether it's necessary to use drying agents to remove water from the organic phase before boiling it. why should we do that? what happens if we don't?

2007-02-15 18:32:17 · 2 answers · asked by Alexis 2 in Chemistry

Just had a quick glance at today's headlines and found an interestsing news that Anna Nicole's corpse is now a target of legal battle...A court has ordered the burial of her body within short period of time from now because "Although her body is now refrigerated and seemingly no damages have been done to it; we still recommend speeding up the legal process to have the body buried as soon as possible because any delay may cause damages to her..." This somewhat laughable statement makes me wonder if the refrigeration can cause damages to dead bodies...isn't it supposed to be one of the most effective way to preserve a body?

2007-02-15 18:30:39 · 7 answers · asked by joan_crawford_rise_again 1 in Medicine

2007-02-15 18:29:31 · 18 answers · asked by Anonymous in Astronomy & Space

2007-02-15 18:24:48 · 19 answers · asked by Bijal Jivan 1 in Earth Sciences & Geology

Because of the law of conservation of energy the possibility of a perpetual motion is excluded, but the Universe itself is in a perpetual motion, so on what basis should we consider the conservation of energy as a law?

2007-02-15 18:23:58 · 7 answers · asked by Simona S 1 in Physics

I needed to post this here because I saw a question by the user "A T" and was kind of disturbed because I have the EXACT same kind of things happen to me. I wasn't satisfied with the answers, so I decided to post this just to get some clarification and in the hope that A T would see this and wouldn't feel alone.

A conversation with a good friend of mine tonight lead me to this place. I wake up at night and most of the time when I look at my clock (which is 10 minutes fast) and it' says "4:44". When I stay at friends houses, I usually wake up and THEIR clocks tell me 4:44.

There are times when I have NO idea what time it is, don't have a watch on, go to my computer, and you guessed it, it's 4:44. My microwave stopped one day at 4:44. I looked at my spedometer the other day on a whim (I never look at it) and it read 190,444.

It's kind of scary, and It's making me a bit anxious lately. It's been going on for years now...

2007-02-15 18:22:12 · 14 answers · asked by evenbeansdoit 1 in Paranormal Phenomena

2007-02-15 18:18:26 · 12 answers · asked by Anonymous in Astronomy & Space

2007-02-15 18:18:02 · 2 answers · asked by manik 1 in Engineering

2007-02-15 18:13:07 · 3 answers · asked by manik 1 in Astronomy & Space

A container has the shape of a rectangular solid and the container is filled with water. when a rock is submerged, the water level rises 0.5 cm. find the volume of the rock if the rectangular solid container has width 30 cm, length 45 cm and 20 cm. of height when the rock is in the water, which is in the container.

2007-02-15 18:09:44 · 12 answers · asked by j;lkj;lkj;lkj;lkj 2 in Mathematics

2007-02-15 18:06:24 · 4 answers · asked by Shabnam 1 in Botany

saw it in a movie wanted to know if it was real or not?

2007-02-15 18:01:07 · 9 answers · asked by epicn61 1 in Physics

do i have to use the trigonometry property of cos i.e cos(A+B) = cosAcosB-sinAsinB and then find the parial derivatives?

2007-02-15 18:00:49 · 3 answers · asked by Anonymous in Mathematics

2007-02-15 18:00:31 · 10 answers · asked by Anonymous in Zoology

because of loong waitlists??
how was ur experience and where did you go??

2007-02-15 17:55:32 · 1 answers · asked by xoticeyez1975 2 in Medicine

i am a M.B.B.S. graduate and doing PG in Biochemistry.whats the future job opportunity like?

2007-02-15 17:54:52 · 4 answers · asked by nalo 1 in Medicine

1)in order to conduct an experiment, 4 students are randomly selected from a class of 20. How many groups of 4 students possible?

2)you can answer any 12 questions from a total of 14 questions on an exam. In how many different ways can you select the questions?

3)In Maryland's Lotto game a player chooses 6 distinct #s from 1 to 49. In how many ways can a player select the 6 #s?

4)3 points that are not collinear determine 3 lines. How many lines are determined by nine points, no 3 of which are collinear?

5)The # of possible interpersonal relationships increases dramatically as the size of a group increases. Determine the # of different 2-person relationships that are possible in a group of people of size (a)3, (b)8, (c)12 and (d)20.

2007-02-15 17:49:49 · 3 answers · asked by Anonymous in Mathematics

answer is 1/2arctan(x^2)+C+c

2007-02-15 17:49:35 · 7 answers · asked by dimachevelle 2 in Mathematics

I have a Tarantula, anything special I should be feeding it?

2007-02-15 17:48:43 · 6 answers · asked by Anonymous in Zoology

2007-02-15 17:42:31 · 2 answers · asked by Marakey 3 in Mathematics

A man pushes on a piano of mass 180 kg so that it slides at a constant velocity of 12.0 cm/s down a ramp that is inclined at 11.0^\circ above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push

how can you have a constant velocity while applying constant force on a frictionless surface? am i missing something?

2007-02-15 17:41:49 · 4 answers · asked by trungngo18 1 in Physics

what name do we associate with the various phase changes- evaporation/condensation, freezing/melting, deposition/sublimation?

2007-02-15 17:40:02 · 1 answers · asked by hoodiechick 1 in Weather

2007-02-15 17:38:47 · 15 answers · asked by Anonymous in Astronomy & Space

2007-02-15 17:38:01 · 1 answers · asked by Anonymous in Chemistry