Science & Mathematics - 24 November 2006

2006-11-24 02:12:43 · 21 answers · asked by Michael T 1 in Astronomy & Space

There are two problems that just state "evaluate each of the following sums that exist". I don't think this means add them up since we are studying series and sequences but there is no further direction so I'm at a loss. What form should an anser be in?

1. 15+9+27/5+81/25+....

2. 1+1/3.02+1/(3.02)^2+1/(3.02)^3+....

Many thanks for your help!

2006-11-24 02:09:47 · 8 answers · asked by mdetaos 3 in Mathematics

eg. lipoproteins, glycoproteins.....transmembrane proteins, etc.

2006-11-24 02:05:43 · 3 answers · asked by Anonymous in Biology

I have a really cool old key, i'm not too sure what its made of but i was just wondering if it likely contained lead in it that could make it dangeruos to wear as jewellry...?

2006-11-24 02:05:42 · 5 answers · asked by Holly 2 in Other - Science

Surely if it was purely random/chaos you would eventually see shapes and/or blocks of colour? So is there a reason why you don't see this?

2006-11-24 02:04:29 · 6 answers · asked by James J 1 in Physics

I need a siple thing that water reacts to. I am doing scinece and it says I gotta determine the identity of unknown substances. Water is one of them. So what does it react with so I can know the difference between it and Rubbing alchohol, viengar, and salt water. Also if you know what those react with that would help. They can't react with the same things, like venegar can't react with whatever I use for water because then I wouldn't know the difference.

2006-11-24 02:01:58 · 5 answers · asked by torirowe 2 in Chemistry

i often see rockets making white lines all over the sky from their tails with smoke. i wonder what is the purpose behind it.

2006-11-24 02:01:57 · 7 answers · asked by johny 1 in Earth Sciences & Geology

2006-11-24 02:01:17 · 1 answers · asked by KIATOU 1 in Chemistry

Sunlight reaches my hip while reading at a window. Last year it reaches only my knee. This year (2006) it reaches my face. I sit in the same chair, same place. Does the sun's angle change each year ?

2006-11-24 02:00:38 · 3 answers · asked by pe_nyun06 2 in Astronomy & Space

I was wondering what the other foci in the solar sytem would be, considering the sun is one of them. What would it's location be in miles from the sun? And is the sun the center focus?

2006-11-24 02:00:30 · 7 answers · asked by Br 3 in Astronomy & Space

2006-11-24 01:59:24 · 5 answers · asked by jockster_scotboy 1 in Geography

2006-11-24 01:57:48 · 3 answers · asked by agerrell 1 in Mathematics

Just wondering.... he said, you drop two things at once, from same hight and that they will hit floor at the same time. Two words.... Helium balloon.

Have i just proven a famous theory wrong?

2006-11-24 01:52:48 · 5 answers · asked by Aled H 3 in Physics

does an object always have the same mass and length?

2006-11-24 01:47:45 · 6 answers · asked by lavenderedolphinluvermashimaro89 2 in Physics

i've always been fascinated with scandinavia and the nordic countries. are they prosperous because they are very tolerant? what is the secret to their success?

2006-11-24 01:45:34 · 2 answers · asked by jqdsilva 3 in Geography

2006-11-24 01:43:13 · 13 answers · asked by Curious George 1 in Physics

Hello. well i am doing a project and in it i need to make a home powered houe with at least three rooms and each have to have a light in the room with a switch to turn it off. now i have already decided that i will be making my house out of popsicle sticks, but i need ideas for wiring and connecting the lights to the wires. so wud any one have ideas for the way i wud wire and and have a power source for this project? the options i have for the power source are solar, wind etc. so any of u no how to build a mini model house with lights and switches with a renewable souce cud u help me out.

2006-11-24 01:38:53 · 3 answers · asked by Jay 1 in Engineering

Do you think that physics will ever be complete in the sense that there will no longer be any need for theoretical and experimental research in physics?

2006-11-24 01:35:04 · 9 answers · asked by lavenderedolphinluvermashimaro89 2 in Physics

i know there is 20 altogether, but is it 10 or 11 essential?

2006-11-24 01:34:22 · 4 answers · asked by Anonymous in Chemistry

2006-11-24 01:34:04 · 6 answers · asked by styce 4 in Chemistry

2006-11-24 01:33:15 · 11 answers · asked by sheryliCIOUS 1 in Zoology

2006-11-24 01:26:25 · 3 answers · asked by PAMELA G 1 in Biology

Consider the following unbalanced equation
Ca3(PO4)2(s) + H2SO4(aq)------> CaSO4(s) + H3PO4(aq)

What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg concentrated sulfuric acid (98% H2SO4 by mass)?

2006-11-24 01:25:07 · 2 answers · asked by Catherine D 1 in Chemistry

If high pressure increases velocity of fluid, how does fluid flow faster when the pressure is lower?

2006-11-24 01:24:38 · 3 answers · asked by Sir Guitarist 2 in Physics

From my observations it seems a large percentage of fat people have glasses, compared to a small percentage of thinner people. Is this a coincidence, or is this the case everywhere?

2006-11-24 01:21:12 · 9 answers · asked by Jethro 5 in Other - Science

do you set the limiting reagent equal to 1, or the reagent in excess?

2006-11-24 01:20:01 · 2 answers · asked by Anonymous in Chemistry

2006-11-24 01:16:36 · 5 answers · asked by Catherine D 1 in Chemistry

Multiplication is repeated addition. So, how is multiplication of decimals shown as addition of decimals?

2006-11-24 01:14:57 · 4 answers · asked by Maria 1 in Mathematics

im trying to find out if pure silver is attracted to magnets.

2006-11-24 01:14:08 · 8 answers · asked by Anonymous in Other - Science

2006-11-24 01:11:14 · 6 answers · asked by Anonymous in Biology