Science & Mathematics - 27 August 2007

List the levels of biological hierarchy from subatomic particles to macromolecules

2007-08-27 09:36:10 · 5 answers · asked by The One 1 in Biology

I know other mamals do.

2007-08-27 09:35:44 · 3 answers · asked by Anonymous in Zoology

how do you do these?

14) NH3 + H3PO4 ----> (NH4)3PO4
15)NH3 + O2 ----> N2 + H2O
16) Fe2O3 + H2 ----> Fe +H2O
17) PbO2 + CO ----> Pb + CO2
18) Al + Fe2O3 ----> Fe + Al2O3
19) Fe3O4 + C ----> Fe + CO2
20) H20 + Co ----> H2 + CO2

and the numbers are meant to be small but i can't do them like that? so does any one know how to do these? I really really need help, very apreciated :D

2007-08-27 09:34:33 · 2 answers · asked by **Lilyanne** 3 in Chemistry

determine the grams of ethylene glycol(c2h4(oh)2) which must be dissolved in 2500 g of water to make a 4.78 m solution

2007-08-27 09:34:31 · 5 answers · asked by louis h 1 in Chemistry

can anybody help me with this equation please?


What mass of ethylene glycol (C2H6O2, molecular weight 62.1) must be added to 10.0
L of water to produce a solution for use in a car’s radiator that freezes at -23.3 °C?
(The density of water is 1 kg L-1. The molal freezing point depression constant for
water, Kf, is 1.86 °C kg mol-1)

how the f*ck do you do this?? its driving me crazy! can anyone give me a formula or something? please?! im goin outta my mind!


and before i get the "do your own homework" crap, its not homework, im trying to revise and im asking for help :]

2007-08-27 09:34:24 · 2 answers · asked by Anonymous in Chemistry

like paranormal stuff like ghost cams and stuf like that

2007-08-27 09:33:56 · 4 answers · asked by John M 2 in Paranormal Phenomena

I need to evaluate the following indefinite integral:

x(x^2+3)^(1/2)

I first thought of trying integration by parts, but I think I'm supposed to use substitution. However, all my examples have a definite integral. So what do I do?

2007-08-27 09:33:36 · 3 answers · asked by psimons144 1 in Mathematics

1.assuming that the period of vibration of a tunning fork depends upon the lenght of the prong and on the density and young's modulus of the material,find by method of dimensions,a formula for the period of vibration[define young's modulus y=stress/strain=(force/area)(extension/original lenght).

2.assuming that the critical velocity vc of a viscous liquid flowing through a capillary tube depends upon the radius 'a' of the tube,the density p and the coefficient of viscosity n of the liquid,obtain a relation between vc,p,a and n.[define coefficient of viscosity n as: force/area times (velocity/displacement).

2007-08-27 09:32:44 · 2 answers · asked by dovey 2 in Physics

Will strange things happen tonight.

2007-08-27 09:32:06 · 14 answers · asked by D 7 in Astronomy & Space

2xsquared + x - 3 = 0

my doing a math review before school starts and this problem is stumping me. the answer is supposed to be 1 according to the answer key, but it'd be great if somebody could show how it's done

2007-08-27 09:31:10 · 10 answers · asked by Sarah 2 in Mathematics

Since the universe is expanding at much less than the speed of light (which our observations say that it is), and we started from a single infitesimal point of existence (the Big Bang), then how come we can see light from billions of years ago? Shouldn't that light have passed us long ago?

2007-08-27 09:29:16 · 6 answers · asked by Anonymous in Physics

2007-08-27 09:29:15 · 11 answers · asked by Kerry M 2 in Astronomy & Space

2007-08-27 09:27:52 · 10 answers · asked by angelaaliyahlove 1 in Mathematics

I remember my mother telling me this as a child but cant understand why this is true. Please help!

2007-08-27 09:27:22 · 3 answers · asked by coolbeankatie 1 in Physics

A soroban has 1 upper bead and 4 lower beads. I prefer not to use ebay except as a last resort.

2007-08-27 09:26:09 · 5 answers · asked by totallyhappy_ebhlinne 2 in Mathematics

>==B==>. . . . . 1km. . . . . >==A==>

At time t=0 both ships inginte their motors.
Both ships are identical and their motors provide constant proper acceleration a=10m/s².

What is relative velocity of the starships (as seen by their captains), when they reach half speed of light v = c/2?

2007-08-27 09:25:10 · 7 answers · asked by Alexander 6 in Physics

2007-08-27 09:24:32 · 9 answers · asked by Sisyphus1970 3 in Medicine

what is the formula for calculating the area of a regtangle?
i think its lxwxh but idk.
and
what is the formula for calculating the volume of a rectangular solid?

plz and thankyou =]

2007-08-27 09:23:26 · 13 answers · asked by Anonymous in Mathematics

2007-08-27 09:21:21 · 7 answers · asked by pings_topaz 1 in Mathematics

2007-08-27 09:18:56 · 4 answers · asked by Anonymous in Astronomy & Space

EXAMPLE: (4x - 28) + (11x + 13) = 180

2007-08-27 09:17:13 · 10 answers · asked by Anonymous in Mathematics

Always
Sometimes
Never

2007-08-27 09:17:06 · 12 answers · asked by Anonymous in Mathematics

2007-08-27 09:15:23 · 5 answers · asked by empot 1 in Mathematics

I own a N80 model, of a SLR from Nikon, and recently noticed that the rubber parts of the camera had entered in a process of dissolve, like if it is melting. The camera has been more the a year whitout use. I live in Brazil, in Rio and the weather may had contributed to the process. I would like some information that help me to stop the process. Any information would be good. Thanks for help!

2007-08-27 09:15:12 · 1 answers · asked by Rafael Mathra 1 in Engineering

So im outside of my house and i hear this crazy sound. I look ver and see something fall from a tree. I walk over and a locust and what im guessing was a hornet (yellow and maybe partly red) Were going at it in the grass. The hornet came out victorious bit off the locusts wing and then just flew away. I picked up the locust it was partially alive and i put it back down. I came back a few hours later and there was a huge gaping whole in the locust. What happened? Did the hornet lay something in it?

2007-08-27 09:12:15 · 3 answers · asked by jersey_pimp609 2 in Biology

2007-08-27 09:09:55 · 4 answers · asked by Anonymous in Engineering

the fermentation of glucose to produce ethyl alcohal maybe by the
equation C6H12O6 ------ C2H5OH* CO2 must be balenced
determine the grams of gulcouseC6H12 O6 required to produse 500mL of 2.5 Methyl alcohal c2 h5 oh

2007-08-27 09:09:42 · 1 answers · asked by louis h 1 in Chemistry

For math dosent make any sence 2 me

2007-08-27 09:08:59 · 7 answers · asked by angelaaliyahlove 1 in Mathematics

2007-08-27 09:08:27 · 3 answers · asked by Anonymous in Physics

2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+22+2+2+2+2+2=_

2007-08-27 09:03:08 · 3 answers · asked by Anonymous in Mathematics