Science & Mathematics - 26 January 2007

How many grams of nicotine (C10H14N2)contain 18.0 g H?

mass C10H14N2 = __________g

2007-01-26 07:05:59 · 2 answers · asked by beachbum 2 in Chemistry

2007-01-26 07:04:52 · 3 answers · asked by zeebetite 1 in Earth Sciences & Geology

2007-01-26 07:00:22 · 2 answers · asked by Anonymous in Botany

2007-01-26 06:59:34 · 6 answers · asked by Anonymous in Geography

both made mistakes in the relationship, my significant other says we can no longer have a physical relationship. For the past 2 months we talk everyday, and they tell me there is no one they would rather spend time with. Is it easy for engineers to just cut off feelings and have a friendship with someone they were in love with? I'm having trouble cutting off my feelings. Help...would love your insight.

2007-01-26 06:58:58 · 6 answers · asked by :-) 2 in Engineering

anyone have an idea where I can view surgeries performed, like any video website to view all types of surgery, I am a med student in progress...I tried google and yahoo already but no luck, thanks

2007-01-26 06:57:07 · 2 answers · asked by triplecherrylicious 3 in Medicine

2007-01-26 06:56:28 · 3 answers · asked by Anonymous in Mathematics

2007-01-26 06:56:17 · 6 answers · asked by .prc to .pdf 1 in Chemistry

I want to make a lamp using Luxeon LEDs, up to 50 of them, and I want it to plug in to an AC power outlet. Converting to DC is acceptable of course but I am not sure where to get started on driving these little buggers.

2007-01-26 06:55:10 · 4 answers · asked by Anonymous in Engineering

Science-related.

2007-01-26 06:52:48 · 21 answers · asked by lirael1019 1 in Biology

ok - i was bored at work so i decided to spin myself around in my chair for a while....i know i made myself dizzy...i was just wondering why when i stop turning why does it take about 5-10 secs before the rest of the world does....what causes this...?

2007-01-26 06:51:59 · 18 answers · asked by beachnut222000 4 in Physics

2007-01-26 06:50:00 · 11 answers · asked by goring 6 in Astronomy & Space

I would like to make liquid CO2 in small batches. Are there any relative inexpensive non-commercial size liquid CO2 generator. I imagine it will consist of high pressure compressor coupled with a chiller. Also making it out of surplus used parts/subsystems will be great.

2007-01-26 06:49:31 · 5 answers · asked by lightpulse 4 in Engineering

I have a co-worker who feeds the plants on her desk with coffee now and then. She says the pH or the nitrogen content of the coffee makes the leaves of the plant shinier and greener. Is there anything to this, or could coffee hurt a plant somehow? Has anyone heard of anyone else doing this?

PS: She doesn't give the plants coffee exclusively. She waters them too, but occasionally gives them a little of the room-temperature coffee left in her mug after she's done drinking it. She drinks it black, so there's no sugar or creamer in there.

2007-01-26 06:49:18 · 8 answers · asked by Jeff 3 in Botany

2007-01-26 06:46:38 · 3 answers · asked by goring 6 in Astronomy & Space

hello member, To clean stainless steel material by passivation we can do it?

2007-01-26 06:45:52 · 2 answers · asked by Apsar J 1 in Engineering

2007-01-26 06:45:47 · 7 answers · asked by Tenzin 1 in Mathematics

2007-01-26 06:45:33 · 5 answers · asked by ladona c 1 in Physics

Materials:
a. Regular paper label (with adhesive),
b. Plastic film surface with repeating U-ribs (surface look like _ _ _ _ _ _ _ ) -dotted line indicated area in contact with paper label.

Paper label will curl on edge with time (indicated no sticking) and peel off easily causing label loss during transportation.

What steps/method recommended?

2007-01-26 06:44:54 · 1 answers · asked by kk 1 in Engineering

2007-01-26 06:44:26 · 2 answers · asked by donielle 7 in Earth Sciences & Geology

I'm finding it hard to find details on the net, any advice is greatly appreciated - I'm detailing nano-technology's relationship with "intelligent materials"

2007-01-26 06:42:09 · 3 answers · asked by Anonymous in Other - Science

You'd think all that bacteria etc. would make them sick. E-coli, salmonella, etc.

2007-01-26 06:38:20 · 6 answers · asked by Anonymous in Zoology

2007-01-26 06:38:11 · 4 answers · asked by Jill L 1 in Physics

It is claimed that by using an automatic filling machine, the average amount of chips in each bag is 100 grams. A random sample of 12 bags of chips showed a mean weight of 101.25 grams with a standard deviation of 2.5 grams. Is the machine operating properly at 0.05 level of significance?

2007-01-26 06:38:08 · 4 answers · asked by Ghani A 1 in Mathematics

I am a sophomore at university. Unfortunately, because of the pre-requisite system, I am in PreCalculus. I have already completed a calculus course in high school, and have completed 2 semesters of "Calculus for Business & Life Sciences" at university. I am familiar with all basic math up to calculus. I wish to learn more math, and to become as knowledgeable as possible about the more advanced topics in mathematics. I am not able to join the advanced classes now, so I would like to learn on my own. Please recommend some books and topics for me, I would like to start with material that is covered after Calculus I. Any information is helpful.

2007-01-26 06:38:08 · 13 answers · asked by ultra _ girl 3 in Mathematics

Thompson & Bourassa Quantum Aether Dynamics

2007-01-26 06:37:27 · 3 answers · asked by goring 6 in Astronomy & Space

I need to know what the purpose is of checking the acidity of carbonyl compounds is, can anyone help?

2007-01-26 06:34:26 · 6 answers · asked by Anonymous in Chemistry

2007-01-26 06:34:19 · 9 answers · asked by Olivia 4 in Mathematics

Thank you so much for any help!


20. Fermentation allows for the recycling of NAD+ and the production of ATP under____conditions.
21. In absence of oxygen, instead of aerobic respiration following glycolysis, glycolysis is followed by ______. 22. During fermentation, either ethyl alcohol and carbon dioxide or ___ is formed.
23. Because oxygen is the final electron acceptor at the end of the electron transport chain, if oxygen were absent in aerobic respiration, no _____ would be made.
24. Hydrogen ions combine with electrons and oxygen forming ____ at the end of the electron transport chain.

2007-01-26 06:33:36 · 3 answers · asked by Anonymous in Chemistry

chemical or physical change if the temperature of hot coffee drops upon the addition of some cold milk

2007-01-26 06:32:44 · 8 answers · asked by chelsey s 1 in Chemistry