Science & Mathematics - 30 November 2006

2006-11-30 09:01:48 · 5 answers · asked by radtadstar 2 in Astronomy & Space

2006-11-30 09:00:03 · 2 answers · asked by chipper1963 1 in Chemistry

1) HCL+AgNO3->HNO3 +AgCl

2)C7H16+11 O2->7 CO2 + 8 H2O

3) P4O10 +6 H2O->4H3PO4

4)3 Fe +4H2O->Fe3O4+ 4 H2

5)2 H3PO4->H4P2O7+H2O

6)Al2(SO4)3+ 3 Ca (OH)2-> 2 Al(OH)3 +3 CaSO4

7)CAC2+ 2 H2O->C2H2+ Ca(OH)2

8)Fe2O3+3C->3CO+ 2Fe

9)2MgNH4PO4->Mg2P2O7+2 NH3+ H2O

2006-11-30 08:59:17 · 1 answers · asked by Anny07 2 in Chemistry

A statistics question for you.

You have a 10-sided die with ONE 'YES' and NINE 'NO' outcomes (i.e. 10% chance of getting a 'YES').

If you roll the die 7 times, what is the probability that you get AT LEAST ONE 'YES' to come up?

Answers and explanations please. Thanks in advance.

2006-11-30 08:58:48 · 2 answers · asked by Sin™ 6 in Mathematics

2006-11-30 08:57:59 · 4 answers · asked by Angel Eve 6 in Chemistry

2006-11-30 08:57:26 · 5 answers · asked by chipper1963 1 in Chemistry

I know that on ECG, with unstable angina you get ST depression and with M.I. you get ST elevation. But how come two similar conditions produce completely opposite actions on ECG? I've read up on it and I can't find a simple answer. Can anyone explain to me simply why this happens?

2006-11-30 08:56:53 · 3 answers · asked by Xenophonix 3 in Medicine

1. What information is provided by the specific block location of an element?

2. What signs are associated with electon affinity values, and what is the significance of each sign?

3. How does the size oif a cation and an anion compare with the size of the neutral atom from which it is formed?

4. How do the values of successive ionization energies compare?
- Why does this occur?

5. Why do halogens readily form 1- ions?

2006-11-30 08:56:31 · 2 answers · asked by Lily 1 in Chemistry

Imagine you have a square meter of toliet paper. The oter edges are supported by a wooden frame and then the entire apparatus is placed in a vacuum (a region devoid of air). Next, sand is slowly added in the center. After adding 0.500 kg of sand to the toliet paper, it rips. Then the experimenter states that he has just disproved that atmospheric pressure could be 10,130 N/m (squared). This pressure indicates that the air alone will apply a force 10,130N to a square meter of any material. The experiment indicates that toliet paper can only withstand a pressre of 0.500 N/m(squared). Is the method correct and is his conclusion accurate?

2006-11-30 08:53:46 · 3 answers · asked by Anonymous in Physics

I'm really confused.

The # of MO are obtained by counting the atomic orbitals; for every atomic orbital combined, one MO results.

So here's my question (s):

1) To determine the # of MO, which atomic orbitals do we count? The valence atomic orbitals? The atomic orbitals with only 1 e-?

2) Once we have the # of MO, how do we determine how many electrons are in either a bonding or antibonding orbital?

For instance, how would I determine that there are 3 bonding pairs and 1 antibonding pair in C2?

I'm really confused, any help would be appreciated. Thank you.

2006-11-30 08:53:38 · 1 answers · asked by other_user 2 in Chemistry

2006-11-30 08:53:13 · 6 answers · asked by rocmo 2 in Mathematics

2006-11-30 08:52:19 · 20 answers · asked by nina s 1 in Mathematics

I am doing a project for school and I can't think of what to use to make my DNA model. I would really like it if you could give me some ideas.

2006-11-30 08:51:59 · 4 answers · asked by amy d 1 in Biology

2006-11-30 08:51:18 · 12 answers · asked by Thomas W 1 in Botany

CHEMICHAL AND PHYSIOLOGY WEY

2006-11-30 08:49:19 · 2 answers · asked by Anonymous in Biology

2006-11-30 08:47:50 · 5 answers · asked by Breanna S 1 in Chemistry

I'm working on a project for work that requires the solution of a pretty general optimization problem:

It's essentially a resource allocation problem. Imagine x different resource types which are needed to engage in some combination of projects. Each project requires a specific combination of resources and yields a certain profit.

The algorithm must find the resource/project combination that maximizes profitability. Looking for something that is better than exhaustive / brute force optimizations. Thanks!

2006-11-30 08:46:37 · 2 answers · asked by pknyc 1 in Mathematics

hi, I'm looking for a place I can buy COBALT CHLORIDE (ll) in London.
I want to use them for printing as invisible ink, like lemon or apple juice.

2006-11-30 08:46:19 · 2 answers · asked by littleyumi 1 in Chemistry

The problem is to find the volume of the solid enclosed by y=x^4 and y=1, rotated about the line y=2. (Disk method)

2006-11-30 08:45:39 · 1 answers · asked by Jacqueline Sherry 1 in Mathematics

2006-11-30 08:44:48 · 7 answers · asked by km 1 in Mathematics

name two properties of a regular polygon...thanks!

2006-11-30 08:44:39 · 5 answers · asked by stvsag 1 in Mathematics

I want to know if territories like French Guiana, British Virgin Islands, Greenland, St. Pierre et Miquelon, etc... belong to the European Union.

Excuse me if my english is poor, I'm a user from Spain.

2006-11-30 08:44:38 · 2 answers · asked by Anonymous in Geography

I don't weigh much, 120 lbs, and was wondering if this had any effect on the dose. i've never done acid before.
i'm planning on taking 3 hits with some friends on saturday night.
i only want to hear from people who actually know about this subject, not someone trying to talk me out of doing acid.

2006-11-30 08:43:11 · 6 answers · asked by Anonymous in Medicine

How do I prove that:
4sin^2 theta (don't know how to type it) +2cos^s theta = 4 - 2cos^2 theta

Please and Thanks.

2006-11-30 08:42:21 · 5 answers · asked by stumpedzorz 1 in Mathematics

2006-11-30 08:40:54 · 2 answers · asked by km 1 in Mathematics

2006-11-30 08:40:40 · 3 answers · asked by dorkified at heart 1 in Biology

2006-11-30 08:40:16 · 3 answers · asked by kasia xOox 1 in Astronomy & Space

A snack bar sells burritos and nachos during basketball games, to make a profit the snack bar must sell at least 10 burritos but cannot prepare more than 40. It must also sell at least 30 nachos but can not prepare more than 70. The snack bar cannot prepare more than a total of 90 burritos and nachos altogether. The profit is $0.95 on a burrito and $0.45 on a nacho. How many of each kind of snack should be sold to make the maximum profit.

I have to graph it and solve it, but please tell me what to graph and how to solve thanks so much :D

2006-11-30 08:40:15 · 3 answers · asked by Loomie 1 in Mathematics

I tried googling, but I can't find a list of generally known formations of basalt. And I would like to find one locally. Thanks ahead :)

2006-11-30 08:39:52 · 4 answers · asked by jft1217 2 in Earth Sciences & Geology

thankyou very much

2006-11-30 08:39:52 · 4 answers · asked by rachel w 1 in Biology