Science & Mathematics - 25 January 2007

humans only get one replacement - baby to adult teeth, sharks for exemple can replace teeth time and time again.

2007-01-25 09:01:07 · 14 answers · asked by Anonymous in Zoology

2007-01-25 09:00:44 · 14 answers · asked by Anonymous in Other - Science

the ones you read about "the top pediatric neurosurgeon in the country" and "world reknowned plastic surgeon", the "leading oncologist" etc. We see a lot of doctors, and they are, for the most part, terrific, but what if I want to see the "BEST" one there is?? Where would I go to find that information?

2007-01-25 09:00:25 · 1 answers · asked by Lys 4 in Medicine

I am having a hard time with this-could someone at least get me started?
A particle of mass m is traveling at an initial speed v0 = 27.0 m/s. It is brought to rest in a distance of 51.0 m when a net force of 16.0 N acts on it. What is m?

2007-01-25 08:59:54 · 3 answers · asked by Froggiesmiles 3 in Physics

Aim;To find how the current through a conductor varies with the potentoal difference between its ends

2007-01-25 08:59:23 · 6 answers · asked by D@ni DiC@prio 4 in Physics

Keen on learing how the contractors work on determining the volume of the rock blasted when laying a section of a pipe in a water distribution network

2007-01-25 08:58:52 · 1 answers · asked by tejeesingh 1 in Engineering

In relation to my work, selling surgical equipments, I often accompany surgeons during surgery, and I'm very curious why their uniform in O.R. is in green color, in every hospital.

2007-01-25 08:57:26 · 8 answers · asked by Mirna P 2 in Medicine

nickle,silver,carbon or copper?

2007-01-25 08:56:19 · 10 answers · asked by christine v 2 in Chemistry

http://regentsprep.org/Regents/math/syslin/AlgSys.htm
. . .

I am Looking at the page linked above, trying to understand what to do here, but even though the information is presented in a simple fashion... I still have trouble "grasping" this:
3y - 2x = 11
y + 2x = 9
...The site tells me to " Replace the "y" value in the first equation by what "y" now equals. "Grab the "y" value and plug it into the other equation."
....I don't understand why I am doing this, and cannot apply this to a similar, yet different problem.
Can someone please explain this to me as if I were four years old? I am relativley "smart", but this concept is eluding me.
...I am studying for my G.E.D., and I would like to thank everyone in advance for taking the time to help me in my endeavors.

2007-01-25 08:55:35 · 11 answers · asked by bubbie_king 2 in Mathematics

Will its mass change?? why

2007-01-25 08:55:28 · 7 answers · asked by Asa C 1 in Earth Sciences & Geology

http://regentsprep.org/Regents/math/syslin/AlgSys.htm
. . .

I am Looking at the page linked above, trying to understand what to do here, but even though the information is presented in a simple fashion... I still have trouble "grasping" this:
3y - 2x = 11 AND
y + 2x = 9
...The site tells me to " Replace the "y" value in the first equation by what "y" now equals. "Grab the "y" value and plug it into the other equation."
....I don't understand why I am doing this, and cannot apply this to a similar, yet different problem.
Can someone please explain this to me as if I were four years old? I am relativley "smart", but this concept is eluding me.
...I am studying for my G.E.D., and I would like to thank everyone in advance for taking the time to help me in my endeavors.

2007-01-25 08:55:13 · 6 answers · asked by bubbie_king 2 in Mathematics

I cannot find any bugs to feed it and i dont want to kill it with the wrong kind of food as i have done in the past with Venus Fly Traps so if anyone knows what will work as a replacement for bugs please let me know

2007-01-25 08:53:44 · 3 answers · asked by sharpie 3 in Botany

If a person was in a vehicle that would accelerate faster at a slow rate, and slow down, but still maintain some of the additional velocity from the fast acceleration, and alternated this process
for awile, could the vehicle eventually reach a very fast velocity, and the passenger would not experience a large gravity factor (not many g's)?

2007-01-25 08:51:37 · 4 answers · asked by Michael n 2 in Physics

2007-01-25 08:51:36 · 8 answers · asked by Anonymous in Chemistry

whats so imporANT BOUT IT

2007-01-25 08:49:52 · 5 answers · asked by Anonymous in Chemistry

2007-01-25 08:49:24 · 5 answers · asked by PG 1 in Biology

Also besides the unt of Liter being recognized as L...what other unit is liter defined by? m^3, cm^3,g^3,c^3?

2007-01-25 08:49:17 · 2 answers · asked by D M 1 in Chemistry

2007-01-25 08:49:11 · 5 answers · asked by Anonymous in Zoology

2007-01-25 08:48:44 · 1 answers · asked by Anonymous in Chemistry

After pregnancy and weight loss I have stones and need it out. Surgery,one night hospital stay, what is going to be the total cost roundabout? Interested to know from people who have had this surgery how much it cost them

2007-01-25 08:47:52 · 10 answers · asked by Jenny T 4 in Medicine

From raw material to finished product, where do the minerals for the can come from

2007-01-25 08:47:31 · 2 answers · asked by Greg N 1 in Geography

I am a replacement maths/physics/chem teacher, kids from 10 to 16. To get their interest, I make small experiements with "effects".
I am looking for a mixture/experiement that would produce some coloured smoke that would be opaque and abundant enough to be well visible, dissipate rapidely and ESSENTIALLY, harmless!
(making chlorine is easy and nice, but won't do!)
Maybe the formula to make the (white) fumigenes used on stages in concerts?

2007-01-25 08:46:30 · 2 answers · asked by just "JR" 7 in Chemistry

it is a strange place were people disserpear so why not?

2007-01-25 08:45:52 · 4 answers · asked by Anonymous in Geography

2007-01-25 08:44:04 · 2 answers · asked by Anonymous in Botany

which stage of photosynthesis uses each reactant from the overall photosynthesis equation? and which stage generates each products from the overall photosynthesis equation

2007-01-25 08:41:43 · 2 answers · asked by Anonymous in Biology

Also what were the crashes they died in?

2007-01-25 08:39:43 · 11 answers · asked by Anonymous in Astronomy & Space

Please help with math!!

2007-01-25 08:36:56 · 12 answers · asked by bcmall10 1 in Mathematics

2007-01-25 08:36:11 · 3 answers · asked by KATRINA 1 in Astronomy & Space

Can someone please help me, i have my answers and i just want to double chack, thanks !!

2. What are the correct formulas of the product for this reaction:
BaCl2 + K2(CO3)

a. Ba(CO3) + K2CL
b.Ba2(CO3) + KCL
c.Ba(CO3) + KCl
d.Ba2(CO3)3 + KCL

3. What is the classification for this unbalanced reaction?
Fe + HCl -> FeCl3 + H2
a.decomposition
b.combustion
c.double replacement
d.combination
e.single replacement

6. What equation is balanced for the following reaction?
HF + SiO -> SiF + H2O

a. 4HF + SiO -> SiF4 +H2O
b. 8HF + 2 SiO2 -> 2SiF + 4H2O
c. 2HF + SiO2 -> SiF4 +H2O
d. 4HF +SiO2 -> SiF4 + 2H2O

7. Which equation is balanced for the following reaction?
Al + H2O -> Al2O3 +H2
a. 2AL + 3H2O -> Al2O3 + 3H2
b. 2Al +3H2O -> Al2O3 +H2
c. Al + H2O -> Al2O3 +H2
d. 2Al + H2O -> Al2O3 +H2

thanks!

2007-01-25 08:33:42 · 2 answers · asked by nice too meet you. 4 in Chemistry

I heard a story about how Mexico City was founded on a lake and was wondering how they could drain a lake especially so long ago.

2007-01-25 08:33:40 · 2 answers · asked by Joseph M 2 in Geography