Science & Mathematics - 11 October 2006

What type of proof would be acceptable if I were to prove that the set {3,7,11,15,19,.........} contained infinitely many primes? Is there really an airtight solution to this?

2006-10-11 08:30:44 · 8 answers · asked by joe s 1 in Mathematics

many fresh -water one-celled organisms have structures called contractile vacuoles. these structures collect and pump out excess water that accumulates in the cell. what is the process that causes water to flow into these organisms and why contractile vacuoles would be of little value to one-celled organisms living the ocean (salt water)

2006-10-11 08:30:43 · 4 answers · asked by coming4yu17 1 in Biology

Given point "A" whose elevation is 40.100m (measured from sea level) and point "B" (elevation not known). Sewerage culvert pipes of 300mm diameter are to be installed starting from point "A" to "B" along a distance of 25.500m with a gradient of 1:450. What is the elevation of point "B"? Please elaborate.

2006-10-11 08:30:18 · 2 answers · asked by matgadang 1 in Engineering

2006-10-11 08:28:11 · 8 answers · asked by Anonymous in Mathematics

Electricity is the flow of free electrons in a closed circuit. The circuit starts at the electricity company and I (basically) get charged for the number of electrons that enter my property through the meter, But if the electricity company is getting their electrons back (because of the closed circuit) then why do we get charged for the electricity that we 'use' ?

2006-10-11 08:28:05 · 14 answers · asked by Anonymous in Physics

2006-10-11 08:24:23 · 4 answers · asked by marina s 1 in Biology

I have a test in Earth Science tomorrow and i need help plzz..its on different rock types

2006-10-11 08:21:56 · 10 answers · asked by summer m 1 in Earth Sciences & Geology

2006-10-11 08:21:24 · 24 answers · asked by claretjohn1 2 in Geography

2006-10-11 08:19:10 · 21 answers · asked by Anonymous in Mathematics

2006-10-11 08:14:30 · 3 answers · asked by hmmm 1 in Physics

Studied all week and then he gives a 4 problem equation; 3 problems and 1 multiple choice??? THE MULTIPLE CHOICE IS WORTH AS MUCH AS THE PROBLEM EQUATIONS?!??!

Oh, and no values, which shouldnt make it any harder but too used to working with numbers.

Answers were given in h, g, theta, d, a, v, x, y. Damn kinematics......?

2006-10-11 08:13:59 · 5 answers · asked by leikevy 5 in Physics

have gold flakes in soil in gold panning area...how do you tell the difference....

2006-10-11 08:12:00 · 6 answers · asked by carmeljoy2003 2 in Earth Sciences & Geology

Anatomy, chem...etc..Waht did you find the easiest to take first to get it out the way.

2006-10-11 08:10:20 · 3 answers · asked by joker_2oo6 2 in Medicine

always huge amount of water heads towards sea or water pond. defenitely we can convert this energy into power. anybody got idea ?. What I feel is running water ( it is not necessary fall from high elevation) ................ all type of sugestions are requested.

2006-10-11 08:09:24 · 2 answers · asked by svs power 2 in Physics

1. Name (I think its Geranium)
2. Melting and Boiling point
3. State at normal room temperature
4. Chemical Properties
5. Density
6. Usage

I need them for my chemistry assignment any answer of any of these WILL come in use so help me plzz

2006-10-11 08:08:29 · 4 answers · asked by Banna_skillz 2 in Chemistry

2006-10-11 08:07:45 · 4 answers · asked by teran 1 in Weather

when a personin the hospital is given fluid intravenously (an I.V), the fluid is typically a saline (salt) solution with about the same water concentration as human body tissues. how does the use of distilled water in the place of this salinr solution would be expected to upset the patient's homeostasis. how does this refer to the process of diffusion?

2006-10-11 08:04:13 · 5 answers · asked by coming4yu17 1 in Biology

i don't want a very scientifical answer. i need a definition that a 13-year-old could understand.

2006-10-11 08:04:05 · 8 answers · asked by jomama1234 2 in Physics

2006-10-11 08:00:39 · 13 answers · asked by tonyoseiababio 1 in Other - Science

2006-10-11 07:58:41 · 7 answers · asked by skdesigns563@yahoo.com 1 in Mathematics

Why is vinegar added to coating cabbage?

2006-10-11 07:56:05 · 2 answers · asked by Ali 1 in Biology

Thiosulphate ions (S2O3 2-) reacting with iodine to form tetrathionate ions (S4O6 2-) and iodide ions.

Am totally lost as to how to get the redox equation. I gather that the iodine is reduced as;
I2 -------> 2I- + 2e- but that doesn't make sense - should it be I+ ions instead of I-?
Is that right? If so, how do I get the oxidation equation?

Any help much appreciated :)

2006-10-11 07:55:16 · 2 answers · asked by Showaddywaddy 5 in Chemistry

2006-10-11 07:52:27 · 16 answers · asked by ambita2004 1 in Chemistry

2006-10-11 07:51:58 · 2 answers · asked by Anonymous in Chemistry

2006-10-11 07:50:28 · 27 answers · asked by saga097 1 in Mathematics

2006-10-11 07:50:18 · 2 answers · asked by babycakez 3 in Chemistry

2006-10-11 07:48:35 · 3 answers · asked by i_luv_tar2 1 in Mathematics

2006-10-11 07:45:16 · 6 answers · asked by Teresa A 1 in Mathematics

when f(x) is continous function such that its graph passes through the point (a,0).

2006-10-11 07:41:20 · 2 answers · asked by juschill 1 in Mathematics

2006-10-11 07:40:07 · 5 answers · asked by Virginia E 1 in Zoology