Science & Mathematics - 8 November 2006

2006-11-08 16:36:11 · 1 answers · asked by kristine lovele n 1 in Chemistry

Thank you thank you thank you for all the answers!!

2006-11-08 16:35:58 · 2 answers · asked by K-Luh Fo SHIZZLE 1 in Biology

My brother and I are born the same day, 3 years apart, is there any statistic for how often this happens or the likelihood of this happening, i'm sure not that much research has been done on the topic.

2006-11-08 16:34:32 · 13 answers · asked by AliLeA 2 in Other - Science

2006-11-08 16:31:12 · 3 answers · asked by UrNo1Fan 2 in Earth Sciences & Geology

CaCl2+NaHCO3+H2O=CaCO3+NaCl+H2O+CO2

2006-11-08 16:30:34 · 6 answers · asked by Tim T 1 in Chemistry

Im not too good with friction and newtons laws, so i dont know where to start with this. I was able to figure out all but two problems on my HW packet, and i dont have a book so if someone can show me how to do this last problem, i will be very greatful (and can finally get some sleep :)

A 100kg fireman is being lowered from a floor 10 meters above the ground by a rope whose breaking strength is 800 N. The fireman starts from rest and the person lowering the frieman knows the 800 N limit must be adhered.
Draw a free body diagram showing all the forces exerted on the fireman.
What is the fireman velocty when he touches the ground?
The fireman moves 20 cm during his stopping. What is the average normal force exerted on the fireman during the stop?


Thats the question. Since i dont have a book, for the past hour iv been trying to find similar questions and forumlas online to no luck, so i had to resort to asking here. I hope someone here can please help with this question.

2006-11-08 16:28:35 · 2 answers · asked by mryabin 2 in Physics

2006-11-08 16:28:20 · 14 answers · asked by Anonymous in Astronomy & Space

2006-11-08 16:28:07 · 3 answers · asked by cowfigfed 1 in Geography

Headlights obviously must use some power from the engine to keep the battery charged. What is the cost? What about large SUV types vs small economy types, assuming the same lights?

2006-11-08 16:26:32 · 11 answers · asked by joe_tiac 2 in Engineering

This relates to Deal or No Deal, but I have it simplified here:

You have 5 out of 26 cases. There are numbers 1-26 in each of those 26 cases. You want the 9 highest numbers in your cases. You want as many of those 9 numbers as possible. A perfect shootout would be all 5 of your cases containing 5 of those 9. What is the probability that atleast one of your cases contains atleast one of those 9 numbers ?

This is not as easy as it seems. Atleast to me, and I got an A+ in calculus and finite math.

2006-11-08 16:21:19 · 4 answers · asked by Jay Are Zee 1 in Mathematics

A state of matter that normally is a solid or liquid at room temperature.

A state of matter that takes the shape and volume of its container.

A state of matter with an indefinite shape but a definite volume.
Steam from a hot shower.

A state of matter that has a definite volume and takes the shape of its container.


:) thnx

2006-11-08 16:20:32 · 4 answers · asked by ojndoanj 3 in Chemistry

2006-11-08 16:19:30 · 9 answers · asked by briar-an balatbat 2 in Earth Sciences & Geology

2006-11-08 16:19:01 · 3 answers · asked by Anonymous in Engineering

i need the formula and procedure, thank you :D

2006-11-08 16:14:50 · 4 answers · asked by teekay 1 in Physics

-IF YOUR RELIGIOUS PLEASE DON'T ANSWER-Can you provide me with any facts supporting evolution. Please include links of any sort to journal articles, preferably peer reviewed. And please do not answer with a refute to evolution, if you do so i'll report you. Thanks.

2006-11-08 16:13:03 · 7 answers · asked by D$ 2 in Biology

(3/2w^2)/4w...is it possible to eliminate the double fraction? Thanks.

2006-11-08 16:11:55 · 5 answers · asked by big_j_gizzy 4 in Mathematics

What is the solubility of Ba(IO3)2 in g/100mL (Ksp = 1.5E-9)?

Here is what I did (a million times)
Ba(IO3)2 (s)  Ba+ +2(IO3)-

1.5E-9 = [x] [2x]^2

1.5E-9= [4(x^3)]

(1.5E-9 / 4) ^(1/3) =x

x = (7.211E-4 M)(487.1 g of Ba(IO3)2 / 1 mol ) (0.1/100) = 3.51E-4

(a.) .033 g/100mL
(b.) .100 g/100mL
(c.) .058 g/100mL
(d.) .047 g/100mL
(e.) .244 g/100mL

2006-11-08 16:08:01 · 1 answers · asked by Myra G 5 in Chemistry

Specifically for adderall.

2006-11-08 16:05:52 · 5 answers · asked by djiang83 2 in Medicine

Not matter how hard I try, I cannot grasp my mind around the concept of having one singular smaller then an atom create the entire universe.

And how'd it get there, anyway?

And how'd it manage to create gravity, and protons, and neutrons... and all that.

And what was outside of the singular?

Anyone else find this difficult to understand? My science teacher makes it sound like second grade knowledge.

2006-11-08 16:02:21 · 5 answers · asked by Caroline 2 in Astronomy & Space

2006-11-08 16:00:04 · 9 answers · asked by Howard H 1 in Physics

2006-11-08 15:58:06 · 10 answers · asked by A. G 1 in Earth Sciences & Geology

I have joined Science Olympiad and need to construct a Rube Goldberg like device. For this I need a mechanics kit. I need something strong and sturdy. I do not want any legos or K'nex. Is there any other mechanic set avaliable. -If you know the name please tell me and also where it is avaliable.

2006-11-08 15:56:31 · 2 answers · asked by bearbearbear3sp 1 in Engineering

that is really strong and bring the telescope with you, as your looking back on Earth the way it was ages ago, can you see the people on it thousands of years ago and the other events happening?

Would you see Jesus and wars that were happening back then?

Is it possible?

2006-11-08 15:56:11 · 9 answers · asked by newyorkchess2005 2 in Astronomy & Space

2006-11-08 15:53:36 · 8 answers · asked by Anonymous in Mathematics

Is it like a sheep's?

2006-11-08 15:52:57 · 8 answers · asked by jess 2 in Zoology

dose its acceleration increase, decrease, or remain constant?

2006-11-08 15:52:46 · 9 answers · asked by lena 1 in Physics

I know it would be y=-7x+5 (I think?) I just need help! and how to graph it! Thank you soo much!

2006-11-08 15:51:30 · 2 answers · asked by Nurse2b 1 in Mathematics

Here's a specific example:

f(x) = x^2 if x <= 1 and
f(x) = 2x if x > 1

It's a parabola that turns into a line. It doesn't have any gaps or visible corners. The limit of f(x) as x approaches 1 is 2, and the limit of f'(x) as x approaches 1 is 2. But my calculus teacher says there's a corner at x = 1, and that piecewise polynomials always form a corner.

2006-11-08 15:48:29 · 5 answers · asked by Pete 2 in Mathematics

2006-11-08 15:48:08 · 9 answers · asked by Lesartistes 3 in Astronomy & Space

what is its acceleration just before it hits the ground?

2006-11-08 15:46:57 · 3 answers · asked by lena 1 in Physics