Science & Mathematics - 14 December 2007

I was putting some clothes in the washer and then all of sudden something brush the back of my thigh. It was so obvious that I turned really quickly thinking it may have been my dog or my husband. My dog was outside and my husband was in the bathroom. He would have not had time to mess with me like that then run to the bathroom. It was like having someone tap you on the shoulder then duck down so you don't see them. I never had anything like that happen and it has been bugging me and no I was not on any type of drugs or alcohol nor have I ever been. I just thought it was weird. I am a naturally curious person so I am pretty open minded to experiences. Any ideas? Describe any experience you may have had I would love to read it.

2007-12-14 10:08:24 · 12 answers · asked by animalsrgodsgifts 2 in Paranormal Phenomena

A block w/ height H, area A, and density half that of water floats (in H2O). You depress the block so that an extra length y is submerged past the equilibrium. When you release the block, what is the net force acting on it?

2007-12-14 10:07:39 · 1 answers · asked by Diane S 2 in Physics

I have the Math credits that are required. I am taking Chemistry, I have completed 2 out of the 4 I need. My question is, would it be better to take all of my Chemistry classes and then take Physics 1 and 2? Would Physics be easier if I have an understanding of Chemistry or does it matter? thanks

2007-12-14 10:06:34 · 2 answers · asked by Boo Radley 4 in Physics

The amount of fill (weight of contents) put into a glass jar of spaghetti suace is normally distributed with a mean μ= 850 grams (g) and standard deviation σ= 8g.



a) Describe the distribution of x, the amount of fill per jar.
b) find the probabilty that 1 jar selected at random contains between 848 and 855g.
c) Describe the disribution of x-bar, the mean weight for a sample of 24 such jars of sauce.
d) Find the probability that a random sample of 24 jars has a mean between 848 and 855g.

2007-12-14 10:02:03 · 1 answers · asked by Anonymous in Mathematics

2007-12-14 09:59:38 · 10 answers · asked by Anonymous in Weather

2007-12-14 09:59:38 · 4 answers · asked by Jughead 1 in Engineering

Whenever somebody tells me in one of the answers to my questions where they live I like to think what it is like there, so where do you live and how is the weather?

2007-12-14 09:57:51 · 16 answers · asked by Lovely cat woman ^_^ 1 in Weather

2007-12-14 09:57:49 · 2 answers · asked by Anonymous in Other - Science

I saw something on the history channel about a comet getting ready to hit the earth but not the one that is supposebly gonna end the world...it said that we had 30 days or something like that until it hits and alot of people will die...but its not gonna end the world its supposed to change the world dramtically tho...is you have seen that episode then tell me what they said because its a possibility they said something totally different than what i just said so can anyone tell me any info that you have about this...it was on like 2 days ago

thanks...

2007-12-14 09:57:26 · 8 answers · asked by JayShaud 4 in Astronomy & Space

plz answer.. just gimme your answer you think is right

2007-12-14 09:55:45 · 8 answers · asked by Anonymous in Mathematics

2007-12-14 09:54:14 · 7 answers · asked by Nicky 2 in Mathematics

do you like/love snow? explain why you like it? thanks for answering and a Merry Christmas to all!!:)

2007-12-14 09:52:00 · 7 answers · asked by Hime-sama 4 in Weather

Integrate: X^2*e^3x dc

I'm assuming this is integration by parts, and I would have to integrate twice, but I can't get the answer. My u = x^2, 2du = x dx, dv = e^3x, v = 1/3e^3x. Is this right?

2007-12-14 09:50:46 · 4 answers · asked by Sean 1 in Mathematics

2007-12-14 09:48:44 · 16 answers · asked by sas 4 in Weather

Because paper is made from wood, it seams that it would be degratable. Meaning it would eventually disolve and become part of the earth. If thats the case then what about paper products, and why do you get a fine from littering with paper?

2007-12-14 09:45:08 · 4 answers · asked by lvillejj 4 in Earth Sciences & Geology

a)no electric charges
b) only neutral charges
c)equal numbers of positive and negative charges
d)only postive charges

2007-12-14 09:44:58 · 7 answers · asked by Anonymous in Engineering

Drakar is a star system in are solar system? Im pretty sure of it.

2007-12-14 09:44:25 · 11 answers · asked by Domina 1 in Astronomy & Space

2007-12-14 09:43:14 · 11 answers · asked by Nicky 2 in Mathematics

?

2007-12-14 09:41:53 · 24 answers · asked by Olga 1 in Biology

really just an illusion?

2007-12-14 09:41:14 · 6 answers · asked by Domina 1 in Astronomy & Space

Please help! Where can I find the info on how to build a popsicle stick bridge?. Does anyone konw how to construct a bridge?

2007-12-14 09:41:14 · 3 answers · asked by Anonymous in Engineering

A projectile can be fired at many angles between zero degrees (horizontally) and ninety degrees (vertically). Which angle would give the greatest horizontal displacement down range? Which pairs of angles give the same landing spot?

Please show/explain all work. Please show what formulas were used.

2007-12-14 09:40:08 · 3 answers · asked by Kantilal P 1 in Physics

Taking an element such as rubidium, when it is supercooled the atoms join together to form a 'superatom'. Rubidium atoms are bosonic so they move together but don't tend to stick together, so what actually happens to the atoms at temps close to abs zero that causes them to become a fermionic condensate.

2007-12-14 09:38:58 · 1 answers · asked by Trevor 7 in Physics

In a test carried by a car manufacturer, a test driver is asked to put on his brakes when a warning light is suddenly flashed. When traveling 25 m/s the driver is able to stop in 50 m after slamming on the breaks. a. What is the car's acceleration?

Please show/explain all work. Please show what formulas were used.

2007-12-14 09:37:41 · 2 answers · asked by Kantilal P 1 in Physics

What are the physical changes, on an atomic level, that something such as caesium undergoes when it is supercooled to the point of becoming a BEC. I know that it becomes a 'squiggle' but can anyone explain it in a little more detail. Thanks.

2007-12-14 09:32:46 · 1 answers · asked by Trevor 7 in Physics

2007-12-14 09:32:02 · 3 answers · asked by j m007 1 in Geography

okay, here's the problem. "Tina and Louise both celebrate their birthdays today. In 3 years Tina will be four times as old as Louise was when Tina was 2 years older than Louise is today. If Louise is a teenager, what is Tina's age?"
So if anyone can help me with this problem I'm willing to give away extra points to on other questions.
Please help me!!

2007-12-14 09:29:37 · 4 answers · asked by sunburst308 2 in Mathematics

i know that fog can form if cool air passes over the warm ground...
but i wanna know if it could form if there is warm air passing over the cool ground

2007-12-14 09:24:20 · 1 answers · asked by Muneeb 1 in Earth Sciences & Geology

Suppose p is a prime and p is congruent to p (mod 4), (ie. p = 4k +3). How do I show that there is no element a in U(p) such that a^2 = p - 1?

2007-12-14 09:23:48 · 1 answers · asked by Anonymous in Mathematics

2007-12-14 09:23:16 · 10 answers · asked by anca_bis22 1 in Weather