Science & Mathematics - 8 October 2006

2006-10-08 12:52:26 · 11 answers · asked by cluj120 2 in Zoology

what is a possible set of quantum numbers for the 2 highest energy electrons in a 82Pb atom? (n,l,ml,ms)

2006-10-08 12:52:22 · 1 answers · asked by BMac 3 in Chemistry

The diagraom shows the plan of a classroom. a) Find the actual dimensions in meters of the classroom. b) Find the ratio of the area of the classroom on the plan to the actual area.

The classroom's width is 3.5cm and the classroom's length is 4 cm and the scale is 1 : 400.

2006-10-08 12:52:03 · 8 answers · asked by Jackie C 1 in Mathematics

determine the mass defect of this nuclide

2006-10-08 12:51:50 · 2 answers · asked by t-man foshizzle 2 in Chemistry

2006-10-08 12:51:42 · 4 answers · asked by Socastee_Angel 2 in Astronomy & Space

2006-10-08 12:50:06 · 4 answers · asked by mailmetlc 3 in Mathematics

I have this problem from homework that I'm having a hard time figuring out. I've looked in the book to try and solve it, but have had no luck.

Gasoline has a density of 0.86 g/ml. How much weight do you add to your care by filling the tank with 15 gallons of gasoline. Report in units of grams, kilograms, and pounds.

If anyone could assist me with solving the problem, I'd really appreciate it!

2006-10-08 12:48:27 · 8 answers · asked by justinz_1fan 2 in Chemistry

2006-10-08 12:44:49 · 5 answers · asked by Anonymous in Mathematics

2006-10-08 12:44:10 · 4 answers · asked by angys51 1 in Chemistry

2006-10-08 12:43:47 · 6 answers · asked by Socastee_Angel 2 in Astronomy & Space

A) matter is lost and energy is taken in
B) matter is lost and energy is released
C) matter is gained and energy is taken in
D) matter is gained and energy is lost

2006-10-08 12:43:26 · 3 answers · asked by t-man foshizzle 2 in Chemistry

2006-10-08 12:42:46 · 7 answers · asked by The Dog 1 in Medicine

Since the beginning as what we now call mankind, how many people have actually seen this planet, take all the people alive and all the people that have died add them together and what do you get?, I'd really like to know if anyone knows this

2006-10-08 12:41:50 · 10 answers · asked by Sentinel 3 in Medicine

What are the normal pressures when swallowing? When full?

2006-10-08 12:41:30 · 1 answers · asked by ee 2 in Biology

4. Where does Iraq rank in oil reserves in comparison to other countries? Which country is number 1?


5. What are banded iron formations? What are the major minerals present? What age are most banded iron formations?


6. List 5 other natural resources besides coal, oil, and iron that come from sedimentary rocks.

2006-10-08 12:40:50 · 2 answers · asked by gods1princesschanel 1 in Earth Sciences & Geology

Is there something like a calliper with springs on it that will measure force of a spring? Specifically I want to measure how much force earplugs exert when compressed. Are there other methods?

2006-10-08 12:39:29 · 4 answers · asked by ee 2 in Engineering

or is it just a rumour?

2006-10-08 12:39:11 · 9 answers · asked by hello 1 in Astronomy & Space

In my O-Chem experiment, I had to extract and isolate caffeine from tea, and then purify it, and take the melting point. The mp of pure caffeine supposed to be 237C, while mine (and others, and according to the text it should be this way) was lower: 219C. WHY? it's one of the question for the post-lab. HELP!

2006-10-08 12:38:31 · 5 answers · asked by Thi 2 in Chemistry

what is the electron configuration (short form) and number of unpaired electrons of 29Cu^+2? Explain please.

2006-10-08 12:38:13 · 1 answers · asked by BMac 3 in Chemistry

2006-10-08 12:36:41 · 5 answers · asked by cluj120 2 in Zoology

what is the electron configuration (short form) and number of unpaired electrons of 34Se? and how did you get it?

2006-10-08 12:36:14 · 1 answers · asked by BMac 3 in Chemistry

velocity and acceleration

2006-10-08 12:34:14 · 10 answers · asked by lgenes_esc5161 1 in Physics

if everything has a begining and an end then what is the deal with space?

2006-10-08 12:33:39 · 4 answers · asked by Anonymous in Physics

2006-10-08 12:33:34 · 7 answers · asked by Char 1 in Mathematics

what's the symbol origin for silicon? why did they use si for the symbol why not something else?

2006-10-08 12:32:54 · 3 answers · asked by =) 2 in Chemistry

Element. How much energy is used up during a period of 5 hrs. by the elemen
A. 352 Wh
B. 550 Wh
C.1,760Wh
D2,580

2006-10-08 12:32:46 · 4 answers · asked by Traci K 1 in Chemistry

I really wanna know this isn't a riddle

2006-10-08 12:32:33 · 10 answers · asked by Anonymous in Earth Sciences & Geology

For the experiment of drawing 2 marbles without replacement from a jar containing two red marbles, 3 blue marbles, 4 green marbles and 1 mauve marble.. find each of the following probabilities?..... I know that you do the probability of 1 - none for atleast problems, but I can't seem to figure this one out.

2006-10-08 12:32:30 · 5 answers · asked by wallabie22 1 in Mathematics

2006-10-08 12:32:14 · 3 answers · asked by Mitzi E 1 in Weather

in my chemistry homework, I am given for the H atom: E_n_ = -(21.79*10^-19 J)/n^2
E_ph_=(21.79*10^-19 J)/((n_L_^-2)-(n_U_^-2))

if it is transitioning from n=1 to n=2, what do the other things mean. How would you calculate the wavelength.

Thanks, I can not find the code for my ebook, so i dont have a book.

2006-10-08 12:32:12 · 1 answers · asked by BMac 3 in Chemistry