Science & Mathematics - 18 December 2006

2006-12-18 15:22:57 · 9 answers · asked by shawnta b 1 in Mathematics

1.Classify each of the following as an atom or a molecule.
a. Be b.Co2 c.N2 d. H2O E. Ne
2.Which of the following are diatomic molecules?
a.CO2 b.N2 c.O d.H2O e.CO
3.What type of elements tend to combine to form molecular compounds?
4.What info. does a molecule's molecular structure give?
5.how do ionic compounds and molecular compounds differ in their relative melting and boiling points?

2006-12-18 15:22:29 · 2 answers · asked by Anonymous in Chemistry

My dad just got some test results. His HDL and LDL cholesterol levels are good. He takes a cholesterol-lowering drug. I think it's Lipitor. However, his Triglycerides are 217. The normal range is 0-150. Why is this and what can he do about it? He fasted before the test.

2006-12-18 15:18:31 · 4 answers · asked by TomB 3 in Medicine

the fastest speed ever recorded for a human was for robert hayes who ran 12.5m/s for a part of race.A Porsche 911 turbo can reach 60mph in 4.6s suppose if robert maintainshis top speed and that the car starts just as he passes it.where and when do they meet?what are their velocities at this point?

2006-12-18 15:18:02 · 1 answers · asked by Ragh 1 in Physics

El Segundo High School put on their annunal musical. The studnets sold 650 tickets for value of $4375. if orchestra seats cost $7.50 and balcony seats costs $3.50, how many of each kind of seat were sold?

2006-12-18 15:18:02 · 8 answers · asked by shawnta b 1 in Mathematics

a hydraulic lift has an input cylinder that is 20 cm in diameter. The need is to lift a 5x10^3 kg object with an input pressure of 30 atm. How big does the output cylinder have to be?

2006-12-18 15:15:54 · 2 answers · asked by Joey 1 in Physics

2006-12-18 15:14:46 · 8 answers · asked by pumpmar 2 in Earth Sciences & Geology

If to convert from grams to moles. You have to divide the # of grmas over the Atomic Weight of the compound (element).
Then, how do I convert from moles to grams? I multiply grams times Atomic Weight?

2006-12-18 15:13:39 · 7 answers · asked by R B 3 in Chemistry

x2-2xy-3y2

2006-12-18 15:13:13 · 7 answers · asked by kaern m 1 in Mathematics

My second grade class asked me this. I do not know, and I cannot find the answer. Can anyone help?

2006-12-18 15:11:12 · 3 answers · asked by Merissa R 1 in Geography

2006-12-18 15:10:26 · 7 answers · asked by Pez 1 in Medicine

2. Round 3,800 to the nearest hundred?
3. What is 29.47 rounded to the nearest tenth?
4.Round 3,800 to the nearest hundred.
5. 2,299/45= ? Round it off.
Round tothe nearest thousand 22,000

2006-12-18 15:07:34 · 6 answers · asked by rosemariestewart64 1 in Mathematics

According to the operon hypothesis of Jacob Monod, lactose controls the expression of the genes for lactose metabolism at the level of

a) transcription
b) processing of the transcript
c) translation
d) post-translational modification

2006-12-18 15:04:19 · 2 answers · asked by Sammie Boo 2 in Biology

1.According to the particle model of light certain kinds of light cannot eject electrons from metals because...?

2.A mass of 6.005g of carbon contains....?(i don't get what thats asking)

3.when an electrical current passed through a glass tube, a paddle wheel placed between the electrons moved. Scientists concluded that......?

please help!!!!

2006-12-18 15:04:11 · 2 answers · asked by lshaw1990 1 in Chemistry

A. is both autotophic and heterotrophic
B. is only a parasitic heterotroph
C. swims away from light
D. is always autotrophic

2006-12-18 15:01:48 · 9 answers · asked by Chloe S 1 in Biology

A particle is 5m east of origin and moving at west at 2m/s.5seconds later it is 11m east of the origin.what was its acceleration?

2006-12-18 15:01:43 · 1 answers · asked by Ragh 1 in Physics

2006-12-18 15:01:41 · 3 answers · asked by bob 1 in Chemistry

And do I get more points for being the first question?

2006-12-18 14:57:35 · 11 answers · asked by Anonymous in Parapsychology

Integration:

1) 1/(x^2+4x+5) dx
2) e^x/(e^x+1)dx
3) e^x+1/e^xdx
4) x square root (ax+b)

Thanks

2006-12-18 14:57:00 · 3 answers · asked by blogaholicness 2 in Mathematics

Why is it that after continuous simulation for extended periods of time, it becomes difficult to conduct nerve impulse along a fibre?

2006-12-18 14:54:53 · 5 answers · asked by Anonymous in Biology

2006-12-18 14:54:44 · 3 answers · asked by R B 3 in Chemistry

i got 12/50 and i took home a retake to take it at my house but like almost evrbody xcept 2 people passed and i have to do the retake and get the test i failed signed 12/50 can u belive that but he used to let us use nooted he gave us a packet with assingments on it that were do in a week and the packett had questions on them and he would go over them and give us the answers and how to do the work and that packet we used them like notes it was so obvios because all the answers were on the packet so i just copied them down and no he doesnt le us u them anymore so he freaking strict he wants al the work if your missing like one number hell take off like 4 points thats a lot and if he hears a noise inside the class hell give that persona referral and the whole class has to stay for 5 min after school so what should i do i ahve to show my parents but someone tell me how to do it im like getting answers on how to tell your parents about a test ******* gay ok enough anyone?

2006-12-18 14:54:10 · 18 answers · asked by Alex33 2 in Mathematics

the number of protons is 7 and the number of electrons is 10
what is the name of this ion

2006-12-18 14:54:02 · 7 answers · asked by tuan l 1 in Chemistry

i'm on the final 4 of ever doing trig functions again & i cannot figure these out for the lifeof me, help!!


1. 4tan^4x + tan^2x -3 = sec^2(4tan^4-3)

2. 1+sinx/cox + cosx/1+sinx = 2secx

3. cos^3x sin^2x = (sin^2x - sin^4x)cosx

4. sinA/sinA+cosA = tanA / 1+tanA

2006-12-18 14:53:17 · 5 answers · asked by xoxo T 1 in Mathematics

2006-12-18 14:52:48 · 7 answers · asked by Krisma 2 in Physics

Does coal derive from fossilized plants and oil from fossilized animals?

2006-12-18 14:51:38 · 7 answers · asked by Ejsenstejn 2 in Earth Sciences & Geology

1 - absorbed
2 - released
3 - created
4 - destroyed

2006-12-18 14:51:33 · 5 answers · asked by Beth 1 in Chemistry

this has been a very annoying question for me
how does a camera flash circuit get 300 volts out of a AA battery
but i am pretty sure someone on here knows but i now know that inductors don't increase the current so it will have to be some thing else but what is it?

2006-12-18 14:46:12 · 9 answers · asked by macgyver 1 in Engineering

Are they the very definition of infinte space?

2006-12-18 14:44:53 · 7 answers · asked by Pinky Pinkerton 2 in Mathematics

including the base and the lid

2006-12-18 14:44:23 · 2 answers · asked by gparker1205 1 in Mathematics