Science & Mathematics - 5 December 2007

I am from Saudi Arabia where we have many industries for chemical and petrochemical engineers. I have a BS in computer sciences.

Now I have a scholarship to do masters degree. I am planning to do Chemical engineering so that I can get a job in theses industries.

Do you think that chemical engineering will be a good combination with computer sciences? I talked with prof., he told me it will be so since there is something called process engineering in which computer programming involved. Do think so?

Is it true that chemical engineers are not needed as many as other engineers?

2007-12-05 11:58:26 · 1 answers · asked by ahapp5 2 in Engineering

Dilute sulfuric acid is added to a solution of lithium hydrogen carbonate

2007-12-05 11:57:39 · 1 answers · asked by aaadaj 1 in Chemistry

Dead line today!!!!!!!!!!!11

2007-12-05 11:55:49 · 2 answers · asked by Karina R 2 in Earth Sciences & Geology

1) A reservoir behind a dam is 31 m deep. What is the gauge pressure at the base of the dam? The acceleration of grav-
ity is 9.8 m/s^2 and atmospheric pressure is
10100 Pa... Answer in units of kPa.

2) What is the gauge pressure 11 m from the top
of the dam? Answer in units of kPa.

2007-12-05 11:55:05 · 2 answers · asked by Anonymous in Physics

what is the % difference in terms of their masses between the actual force of attraction between two sperical masses the size and mass of the sun Ms
and the force of attraction as approximated by GMM/d^2
when the two planets' surfaces are less than 1 inch apart.

if your answer contains the double integral of:

[density(r1)].[density(r2)].[dV1].[dV2] /(r1-r2)^2

explain how this can be integrated.

2007-12-05 11:53:28 · 3 answers · asked by Anonymous in Astronomy & Space

How come there are so many kinds of dogs (e.g. bulldog, puppy, bloodhound, etc)? I don't find such a huge diversity in any other animals.

2007-12-05 11:52:17 · 2 answers · asked by Anonymous in Biology

The source of a sound wave has a power of 1.00 μW. If it is a point source, (a) what is the intensity 3.00 m away and (b) what is the sound level in decibels at that distance?

Explain your work. Thanks! :)

2007-12-05 11:51:27 · 1 answers · asked by Anonymous in Physics

In this magic square, A, B, and C are single-digit numbers, 2A means twice A, etc. Every row, column, and both diagonals add up to the same total. What is that total? Solve for each letter. (4 answers)

2A C 2C

A+2B A+B A

B 3A 2B

2007-12-05 11:51:16 · 2 answers · asked by Anonymous in Mathematics

Hi. I have a really important math assignment due tomorrow. My teacher was absent when we were given it and he hasn't done any problems like this in class (nor are there any similar ones in the book). So, I'm clueless as to where to start. I'm not looking for someone to just tell me the answer, I really want an explanation. Help?

"A reflecting telescope has a parabolic mirror for which the distance from the vertex to the focus is 26 feet. If the distance across the top of the mirror is 72 inches, how deep is the mirror in the center?"

My immediate thought is that the 72 inches should be converted to 6 feet before starting the problem, but after that I've got nothing.

2007-12-05 11:49:28 · 1 answers · asked by Aldo 1 in Mathematics

Why does surface water (rivers and lakes) need to be cvonserved and kept unpolluted?

2007-12-05 11:45:12 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Write an equation of the line containing the point (3,-2) and
a). perpendicular to the line 3x+4y=5
b). parallel to the line y=2x+5

2007-12-05 11:44:25 · 2 answers · asked by 23344 2 in Mathematics

Help me please with this. In a 2 short paragraphs, describe the different impact of genetic drift on a small and large population.

2007-12-05 11:42:35 · 1 answers · asked by sexxiest 1 in Earth Sciences & Geology

Do their fangs work somewhat like our esopagus/trachea, where one channel opens to deliver venom and another opens to recieve the juices? Do they have a mouth that they use for drinking water and "eating?"

2007-12-05 11:42:23 · 2 answers · asked by Anonymous in Zoology

1. A mass m slides without friction down a slide and through a loop. If the mass remainis in the track (even at the top of the loop radius r) what hight must it be released from?

2. A 17 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.5 m/s. How much thermal energy is released in the process?

2007-12-05 11:41:49 · 3 answers · asked by brubabe 5 in Physics

Does it remain a water molecule until it is expelled from the body in urine or sweat or whatever, or is it broken down into H and O and these elements are used by our bodies?

2007-12-05 11:40:03 · 1 answers · asked by pepperc9 1 in Biology

http://video.google.com/videoplay?docid=-1138935117048624484&q=moon+conspiracy&total=872&start=0&num=10&so=0&type=search&plindex=0

I was wondering because the basis of this movie makes a lot of sense (the part about the USSR kicking America's butt in the Space Race and then they suddenly land on the moon), but as a theorist myself, I like to investigate before I believe.

2007-12-05 11:37:24 · 10 answers · asked by Damasta AM inductee 5 in Astronomy & Space

i stept on my favorite kind of bug by axcident (opps)

2007-12-05 11:37:21 · 5 answers · asked by mitilda 1 in Zoology

i have a power point due 2morrow i didnt start cause i have no clue what they are, my teacher wants us to teach ourselves every thing and that totaly sucks. so if you know all help is wanted!!!!

2007-12-05 11:33:40 · 5 answers · asked by alli.cutie123 3 in Biology

Ok, first, thanks for taking the time for reading my question. Second I need help with these physics laws. I don't get the Faraday's law, the Coulomb's law, or the Ohm's law. Are just formuals are what? I need to explain them in a paper and I don't get them myself. Can you help me please! Thanks again!! = )

2007-12-05 11:32:27 · 4 answers · asked by ambey 3 in Physics

i really need this answer please anyone give me some input

2007-12-05 11:31:30 · 2 answers · asked by shadowhacker 1 in Earth Sciences & Geology

2007-12-05 11:31:10 · 4 answers · asked by BlackMamba 5 in Mathematics

2007-12-05 11:27:30 · 3 answers · asked by krishna 1 in Chemistry

2007-12-05 11:26:50 · 3 answers · asked by Claire L 1 in Earth Sciences & Geology

A. none of these

B. Yes, the partial pressure of oxygen in air increases with increasing altitude.

C. Yes, the partial pressure of oxygen in air decreases with increasing altitude.

D. No, the partial pressure of oxygen in air stays constant since the composition of air doesn't change.

E. No, the partial pressure of oxygen in air stays constant since the total pressure of air doesn't change.

2007-12-05 11:26:49 · 2 answers · asked by Anonymous in Chemistry

Two roller skaters stand face to face then push each other away. One Skater has a mass of 90kg and the other has a mass of 60kg.

a. The velocity of the larger skater is 5.0m/s, with that what velocity is the smaller skater traveling at?

b. The smaller skater comes to a complete stop after 10s. How far from the original location is she and what is her deceleration?

thanks

2007-12-05 11:26:43 · 1 answers · asked by Anonymous in Physics

tanΦ=3
pi<0<((3pi)/2)

the answer is [(square root(10))+1]/ -3, but i don't know how to get the answer

2007-12-05 11:26:31 · 1 answers · asked by someone 1 in Mathematics

on a telescope is a photographic plate or a CCD more sensitive to light?

2007-12-05 11:26:17 · 1 answers · asked by xodanceox 2 in Physics

A loaded penguin sled weighing 80 N rests on a plane inclined at 20° to the horizontal. Between the sled and the plane the coefficient of static friction is 0.24, and the coefficient of kinetic friction is 0.14.

(a) What is the minimum magnitude of the force F, parallel to the plane, that will prevent the sled from slipping down the plane?
wrong check mark N

(b) What is the minimum magnitude F that will start the sled moving up the plane?
N

(c) What value of F is required to move the block up the plane at constant velocity?
N

2007-12-05 11:25:39 · 2 answers · asked by Anonymous in Physics

I have created a multitouch screen which works on the "frustrated total internal reflection" technique. Mine is slightly different than the norm however, in the way the image is projected onto the screen. Is this difference large enough to make it a separate patentable entity from those previously pantented, or would it still be just too close. I know this is vague, but I'm more looking for whether slight differences in an invention can warrent a new patent and legal marketing of a product. (all hypothetical)

Ask for clarification if needed! Thanks!

2007-12-05 11:25:32 · 2 answers · asked by Legs M 3 in Engineering

If 281 g of water is contained in a 346 g
aluminum vessel at 6 C and an additional 85 g
of water at 81 C is poured into the container,
what is the final equilibrium temperature of
the mixture? Assume the specific heat of aluminum is 900 J/kg C. The specific heat of water is 4186 J/kg
C. Answer in units of C.

2007-12-05 11:25:23 · 1 answers · asked by yoyoyoyoyoyo 2 in Physics