Science & Mathematics - 8 December 2006

joint be closed?

2006-12-08 03:02:15 · 2 answers · asked by Anonymous in Engineering

Is there a logical difference between possiblity and probability?

When the term 'odds' is used, is that refering to "possiblity" or "probability", or does it have its own unique definition?

When the term 'chance' is used, is that refering to "possiblity" or "probability", or does it have its own unique definition?

Using the Powerball lottery as an example, is there a difference between the possiblity and the probability of the numbers 1 through 6 being drawn (in exact numerical order)?

I've argued that the POSSIBLITY of 1 through 6 being drawn in exact numerical order has the same POSSIBILITY as any other numbers being drawn in any order ... but that the PROBABILITY of 1 through 6 being drawn in exact numerical order is much lower then any other numbers being drawn. Am I right or wrong?

2006-12-08 03:01:27 · 9 answers · asked by kennedystephen 1 in Mathematics

I conducted a survey (n=30) where people could give a score (e.g. on a scale of 1-5) on how they liked a product. I then took a subset from this survey (e.g. n=12) who meet certain criteria (e.g. they are wealthy). For both n=30 and the subset n=12 I calculated the mean of the scores and the confidence levels using the standard deviations (e.g. for n=30, the mean range is 2.9-3.3, for n=12 it's 3.1-3.8). How do I test if the two means are statistically different. Do I just have to check if the mean ranges overlap? If so, are they then statistically indifferent? What if the ranges are 2.8-3.3 and 3.3 to 3.7, does this count as an overlap?

2006-12-08 03:00:38 · 2 answers · asked by tanselmino 1 in Mathematics

I am doing a project for physics and i chose Marie Curie.......why is she important to physics??? What is the physics behind radium and polonium? I need more of the physics and less of the chemistry Marie Curie did....thankyou for your help

2006-12-08 03:00:34 · 3 answers · asked by Anonymous in Chemistry

x + y = -4
x - y = 2


x + y = 10
y = x + 8


3x + y = 5
4x - 7y = -10


y - 2x = -5
3y - x = 5

2006-12-08 02:59:53 · 10 answers · asked by Meg ♥ 1 in Mathematics

I am doing a project for physics and i chose Marie Curie.......why is she important to physics??? What is the physics behind radium and polonium? I need more of the physics and less of the chemistry Marie Curie did....thankyou for your help

2006-12-08 02:59:46 · 2 answers · asked by Anonymous in Physics

The unit vectors i and j are perpendicular.

a) Find F?

b) Find the magnitude of F?

c)Find the acute angle between F and the unit vector i?

2006-12-08 02:59:08 · 7 answers · asked by Ritch 3 in Physics

2006-12-08 02:58:30 · 6 answers · asked by dharma&nirvana 1 in Mathematics

We all know that magnets of the same poles repel each other. Can we use that behavior of a magnet to run the motor of a small fan?

2006-12-08 02:57:48 · 5 answers · asked by cncrned 1 in Engineering

Can I fit a new Meade 10" f-10 Schmidt-Cassegrain Optical Tube Assembly with UHTC Coatings to my old LX-5 forks thus saving 2k?
I dont mind going object to object manualy , so just upgrading the OTA would be ok with my .. is it adaptable?

2006-12-08 02:57:11 · 2 answers · asked by john g 2 in Astronomy & Space

How do you solve:
|w*z|
w=1+4i, z=2-7i

2006-12-08 02:57:05 · 3 answers · asked by Ken 2 in Mathematics

2006-12-08 02:56:40 · 10 answers · asked by moaistatue 2 in Astronomy & Space

2006-12-08 02:56:22 · 9 answers · asked by Anonymous in Physics

2006-12-08 02:56:09 · 1 answers · asked by pdmthope 1 in Astronomy & Space

2006-12-08 02:54:08 · 18 answers · asked by srinivas r 1 in Geography

Although the general and main thinking is that nothing can go faster than light; are black holes not proof that it is possible to go faster than light?Albeit it would be light that's going faster than it's self, it still shows that it is possible to go faster than 186,000 m\s.

Becuase the speed of light alone doesnt cause blackholes. The light has to be accelerated fast enough too cuase a tear in the universe

We though the sound barrier couldnt be broken, and obviously we have planes that faster than sound. More than likely eventually someone will come up for a design for a vehicle that can go faster than light.

Agree or disagree? Why or why not?

2006-12-08 02:54:06 · 9 answers · asked by Maurice H 6 in Astronomy & Space

2006-12-08 02:53:25 · 5 answers · asked by cowgirl642 2 in Geography

a)amino acids are linked in different numbers
b)amino acids are arranged in different sequence
c)DNA make RNA
d)different nucleotides are linked

2006-12-08 02:50:40 · 1 answers · asked by Karla L 1 in Biology

actually i know how to solve this questio but i don't know that why we take xsquare+y square=4a square
why we take here radius 4a squar

2006-12-08 02:49:38 · 8 answers · asked by gourshweta 1 in Mathematics

Method or chemicals that can purify water fetched from the Sea or Ocean and make it drinkable.Chemicals or purification methods that can remove the salty content of Sea Water

2006-12-08 02:48:57 · 7 answers · asked by integrity7702 1 in Chemistry

I just want to know your opinion.Thanks.

2006-12-08 02:48:24 · 11 answers · asked by Devyn C 2 in Earth Sciences & Geology

2006-12-08 02:44:13 · 11 answers · asked by Emmanuel M 1 in Physics

2006-12-08 02:43:53 · 6 answers · asked by Anonymous in Physics

2006-12-08 02:43:52 · 3 answers · asked by ganesh r 1 in Astronomy & Space

2006-12-08 02:43:22 · 2 answers · asked by Anonymous in Physics

I have an x10 system and some outlets don't work now.

2006-12-08 02:43:04 · 6 answers · asked by Anonymous in Engineering

at what temp. would the joint be closed?

2006-12-08 02:42:30 · 2 answers · asked by rkh 1 in Physics

2006-12-08 02:42:24 · 3 answers · asked by Anonymous in Physics

2 y (squared) - y = 6

2006-12-08 02:40:53 · 9 answers · asked by James B 1 in Mathematics

I think the above constraint means that the multiple must look like 111000 but not 111001 etc.

I am really bad when it comes to maths questions like this, so I really appreciate it guys, when someone takes the time to come up with an answer and post it.

However, could you please include all your workings in your answer. I'm hoping that I'll be able to understand questions like this from looking at the workings and then be able to apply that understanding to similar questions.

Again, thanks in advance to anyone that gives answers.

2006-12-08 02:39:53 · 4 answers · asked by IanAttkins 1 in Mathematics