Science & Mathematics - 8 September 2007

A newborn baby is unable to hold down any milk. Examination reveals a developmental disorder in which the esophagus fails to connect to the stomach. What survival needs are most immediately threatened?

2007-09-08 09:02:47 · 1 answers · asked by mike p 2 in Medicine

when calculating the enthalpy value (using Hess's law) to find the change in enthalpy of one reaction by combining 3 others, is it ok not to use one of the below reactions? Can using 2 of the 3 reactions be ok if it still makes the target or main reaction?

2007-09-08 09:02:12 · 1 answers · asked by Wanda McAlias 2 in Chemistry

Show me how u got it. Evaluate the function at the given value of the independent variable. Simplify the results.

f(x) = 1/sqrt(x-1)

Find:

[f(x) - f(2)] / (x-2)

The answer in the back of the book is:

-1/{sqrt(x-1)[1+sqrt(x-1)]}, where x does not equal 2

2007-09-08 08:58:59 · 1 answers · asked by Anonymous in Mathematics

2007-09-08 08:58:09 · 3 answers · asked by Xiang Yu 1 in Chemistry

how would you measure the volume of granuated sugar?

2007-09-08 08:56:41 · 1 answers · asked by hi ! (: 3 in Mathematics

what advantage is there to making graduated cylinders narrow and tall rather than short and wide?

2007-09-08 08:55:31 · 5 answers · asked by hi ! (: 3 in Mathematics

(ax+b)^2 - (bx+a)^2 = 0 ; a does not equal =/-b

I broke down this problem, and winded up with 1=x^2 + x /x^2 + x .

The answer is x=+/- 1.

Did I do it correctly?

2007-09-08 08:54:09 · 6 answers · asked by Anonymous in Mathematics

Gently heating ammonium nitrate, NH4NO3, in a test tube produces a mixture of two gases A and B. No residue remains in the tube.
The mass spectrum of gas A contains peaks at m/e (mass number) values of 16, 17 and 18, whereas that of gas B has peaks at m/e values of 14, 16, 28, 30 and 44.

Identify the peaks in the mass spectra, and suggest the molecular formulae of gases A and B.

2007-09-08 08:54:08 · 3 answers · asked by Anonymous in Chemistry

Chinese Mid- Autumn Festival

2007-09-08 08:51:28 · 3 answers · asked by karina 1 in Astronomy & Space

2007-09-08 08:49:39 · 5 answers · asked by Anonymous in Biology

i need tp produce 11.3 kg of sodium sulfide frem sodium metal and dihydrogen sulfide. how many grams of starting material do I need if I know this reaction proceeds in 65% yield?

2007-09-08 08:49:20 · 1 answers · asked by Anonymous in Chemistry

2007-09-08 08:42:39 · 2 answers · asked by Bluey 3 in Botany

when I react 12.7 grams of Mg with excess HCl gas I expect my proceed with 50% yield. How many grams of MgCl2 should I obtain?

2007-09-08 08:39:54 · 2 answers · asked by Anonymous in Chemistry

2007-09-08 08:37:43 · 5 answers · asked by Anonymous in Mathematics

2007-09-08 08:36:40 · 5 answers · asked by matt_sorrentino 1 in Mathematics

Atmospheric convection and advection
(a) are more effective than conduction in transferring heat around the globe.
(b) are less effective than conduction in transferring heat around the globe.
(c) are about equally effective as conduction in transferring heat around the globe.
(d) are unimportant processes in transferring heat around the globe.

2007-09-08 08:34:20 · 2 answers · asked by AVR 1 in Earth Sciences & Geology

Evaluate Lim x-> infinity

sqrt(5+11x^2) / (7-2x)

2007-09-08 08:34:13 · 3 answers · asked by frozenlint 2 in Mathematics

If you could hypathetically visit another planet, Mars for example, would you still be in the year 2007, since every planet has its own days and years?

2007-09-08 08:34:08 · 7 answers · asked by brewer37 1 in Astronomy & Space

2007-09-08 08:33:50 · 24 answers · asked by Stitch 4 in Astronomy & Space

- large gas giants like Jupiter have immense magnetic fields and are relatively warm
- the moon is relatively close the to earth given the rate of recession
- the mix of supernova seen?
- the high magnetic field of the earth given the rate of drop

which view is the more successful predictively?
what are the predictive successes or failures of both?

2007-09-08 08:31:48 · 13 answers · asked by Anonymous in Astronomy & Space

??

2007-09-08 08:29:36 · 11 answers · asked by Anonymous in Other - Science

What is the mean distance between two randomly chosen points within a sphere of radius 1?

(show how you work it out as well)

2007-09-08 08:27:56 · 7 answers · asked by Anonymous in Mathematics

2007-09-08 08:27:27 · 7 answers · asked by Anonymous in Other - Science

Also, is a covalent compound only between two non-metals? Thanks!

2007-09-08 08:26:11 · 2 answers · asked by microfine19 2 in Chemistry

On Earth, if you light a match the flame will poitn upwards and taper off, always pointing up.

Does it do the same thing in space? Or will it make like a perfect globe on energy surrounding the match?

2007-09-08 08:26:00 · 6 answers · asked by SkepticThinker 2 in Astronomy & Space

Hi... im doing a science report. i can use the internet to find my answers, so im gonna use this while search for other answers to other questions. so yeah, can anyone tell me what the difference is between an atom and an element?

2007-09-08 08:25:14 · 10 answers · asked by echotongue 1 in Chemistry

2007-09-08 08:25:05 · 9 answers · asked by protocon 2 in Other - Alternative

2007-09-08 08:24:44 · 4 answers · asked by Tom K 1 in Mathematics

2007-09-08 08:24:11 · 3 answers · asked by matt_sorrentino 1 in Engineering

5 3/8
that's 5 and 3 over 8 (fraction)
how do i turn this into decimal form?

2007-09-08 08:21:15 · 6 answers · asked by Anonymous in Mathematics