Science & Mathematics - 4 August 2007

A scientist on the radio told me the energy from the vacuum fired the big bang, but energy is a bit like matter so where did the energy come from, and when?

2007-08-04 23:56:37 · 17 answers · asked by originalthinker 1 in Physics

2007-08-04 23:46:58 · 9 answers · asked by Anonymous in Astronomy & Space

And where does the energy that moves repelling magnets come from?

2007-08-04 23:45:42 · 5 answers · asked by Anonymous in Physics

Surely we don't believe that millions of tonnes expelled hydrocarbons annually is more environmentally friendly than long term storage of a few tonnes of radioactive material?

Fact - The fuel is very cheep and the European and American designs have comprehensive safety features.

Fact - The people running them in European and American are very competent (highly degreed and very well trained).

Fact – would really reduce the green house gas affects.

Negative Fact – Bad Management of Three Mile Island in the USA and Chernobyl in the OLD USSR).

By the way, I am part of the Oil and Gas Industry, so no gain from me, just a question!

2007-08-04 23:39:40 · 7 answers · asked by Gratisman 1 in Engineering

Q1) Estimate 1.321 x √3.4 correct to one significant figure.
Q2) Hence estimate 1.321 x 10^5 x √3.4 x 10^6 correct to one significant figure in standard form.

2007-08-04 23:12:18 · 5 answers · asked by Anonymous in Mathematics

2007-08-04 23:11:58 · 1 answers · asked by chan_yew_cheong 1 in Engineering

2007-08-04 22:56:12 · 21 answers · asked by neha 2 in Astronomy & Space

if space can be warped by gravity. then wouldn't you be able to base a warp engine on some kind of massive pseudo gravity generator? like some useless star that we implode and use it to travel vast distances. of course we have to get to the first one first, but after that its all gravy. and maybe we can develop the technology in route scince we'll have a few lifetimes to get there anyway.

2007-08-04 22:44:18 · 4 answers · asked by Anonymous in Astronomy & Space

1) A heavy weight boxer weighs 220 lbs. How much does he weigh in kg?

2) Ana would like to apply as a flight stewardess. The ad says minimum height for applicants is 5ft 3in. How much is this in cm?

3) Seb weighs 8.1 lbs at birth. What is the equivalent in kg?

Please use the Factor Label Method, and please include your solutions. This is due tom. so please please help!!! I'll give a rating of 5 for the best answer.

2007-08-04 22:20:15 · 6 answers · asked by A 5 in Mathematics

a. C2H6
b. C3 H8
c. C2H2
d. C4 H10

Could you explain how u detemine a compound to be the most reactive?

please the numbers they are subscripts

2007-08-04 22:17:05 · 6 answers · asked by Anonymous in Chemistry

Is there a collective term for both of them?

2007-08-04 22:04:13 · 13 answers · asked by Anonymous in Chemistry

2007-08-04 21:52:37 · 7 answers · asked by nestly7 1 in Mathematics

2007-08-04 21:49:57 · 2 answers · asked by Anonymous in Physics

i don't know much if anything about extreme science but i can appreciate what some of you are working so hard at. i was looking at the picture of the "rotten egg" nebula. it is so beautiful i can't get the questions out of my mind, i mean i did the math and discovered it was like 8 trillion miles long! amazing! i was thinking, "what if its not natural? what if its a glimpse of a warp drive engine in full afterburner. crazy, i know. but it got me to thinking... is there somewhere in the hubble images where we could actually see space "bend" and wouldn't that show us that what you cats are talking about is more than theory? my hats off to all you quantum "nerds". i believe that if man can concieve of something than it probably can be done! keep on rockin'!!!!! i'm not overly religios but i do believe that when it all comes together science and religion will meet at the same conclusion, and it brings the bible to mind where god says, " seekmeandyoushallfindme". why do zeolots persist?

2007-08-04 21:39:51 · 2 answers · asked by Anonymous in Astronomy & Space

What instrument will I use for this scenario? "There are two rooms which are separated by a door... The first room is the Mall and in the other room is to the hotel... In the first room there is a good supply of Air coming from A/C...so when the door opens there is a vacuum coming from the second room that causes the cold air from first room to be sucked by the second room... So how can I measure the pressure from the second room when the door opens? Because I need to get How much air has been transferred when the door opens... Thnx

2007-08-04 21:34:00 · 4 answers · asked by ken p 1 in Engineering

2007-08-04 21:32:33 · 12 answers · asked by Anonymous in Astronomy & Space

apart from each other, how can they collide?

2007-08-04 21:31:15 · 23 answers · asked by Anonymous in Astronomy & Space

my math teacher said that the diagonal of the face of a given cube can be solved by the formula d=s√2 then she said that the diagonal of the cube is equal to a diagonal of a face. How can i prove that she is wrong?

2007-08-04 21:30:30 · 8 answers · asked by Anonymous in Mathematics

2007-08-04 21:29:22 · 12 answers · asked by Anonymous in Astronomy & Space

How can you bring exactly 6L of water from the river in 1 trip if you only have a 4L and 9L Container?

Thank you for your workings out XOX

2007-08-04 21:20:02 · 7 answers · asked by Anonymous in Mathematics

2007-08-04 21:14:54 · 5 answers · asked by Anonymous in Physics

I know that a tomato seed when placed with pulp of the same variety of tomatoes will not germinate even if the other factors for germination are there since the pulp is a germination inhibitor.

But how about a tomato seed that is placed in the pulp of another kind of tomato's pulp? Does it still not germinate? And if possible, could you explain why?

2007-08-04 21:14:32 · 1 answers · asked by IcedGem 1 in Botany

the basic deffination and basic detaills about pressure transducer,of what parts it is made of and what happens when get started

2007-08-04 21:12:25 · 4 answers · asked by fsa 1 in Physics

Well we have central air.... How the heck am I suppose to "recreate" these south Carolina temperatures so my new seedlings that came out of the fridge think it's spring time? Does the temperature REALLY matter indoors or just the amount of hours of light? (less light in spring, more in summer, ect" Any tips on this?

2007-08-04 21:12:00 · 2 answers · asked by psycho_suzy2003 1 in Botany

Should it be written with an O2 or H2?

2007-08-04 21:06:02 · 3 answers · asked by edelweiss 2 in Chemistry

x^2+2x+y^2-8y+8=0

i dont see how you turn this equation into a cricle >.< please help!

2007-08-04 21:03:09 · 3 answers · asked by iSmile 2 in Mathematics

can anyone explain to me the effects of alpha, beta particles and gamma ray radiation to our body? regarding their penertrating power and ionizing capacity.

SAID:
A. alpha: very little pentrating power and are able to ionize a large number of atoms within the small area they were able to penetrate.

B. beta: they can penetrate paper or several millimeters of skin and about 1-metre of air. they are absorbed by aluminum or Perspex, a few millimeters thick. their ionizing capacity is less than that of alpha-radiation.

C. gamma: it has no electric charge and has great enetrating power. not even a thicj\k piece of lead or concrete will stop all of them, although, their ionizing capacity is smaller that that of beta-rays.

ASSUME THEY WERE RADIOACTIVE COOKIES CONTAING EACH OF THEM:if you were allowed to eat one, hold one and place one in your pocket, which cookie should be placed where so that you wil receive the least radiation?A B OR C?
EXPLAIN...
WHICH COOKIE IS HARMFUL?WHY?

2007-08-04 21:00:32 · 2 answers · asked by Ninik 3 in Physics

I mean why is that? whats the scientific reason for it?

Thanks.

2007-08-04 21:00:22 · 3 answers · asked by The critic flower. 3 in Other - Science

2007-08-04 20:59:29 · 2 answers · asked by Anonymous in Chemistry

A method needs 2.5% (w/v) sodium acetate. You need to make up 200ml but you only have the hydrated form (CH3COONa3H2O mol. Weight 136). How much would you weigh out?

If you can show me the working I would be greatly appreciated! Or even just a hint

2007-08-04 20:57:52 · 2 answers · asked by chengdu 1 in Chemistry