Science & Mathematics - 4 January 2007

s:1. Who was Robert Koch? Describe his early work. What did he have to do with the following: 2. Pure Cultures 3. Tuberculosis 4. The germ theory 5. Write Koch's Postulats. Why are they so significant? DUE TOMORROW!

2007-01-04 10:12:22 · 2 answers · asked by Anonymous in Medicine

so i get the difference between the two, i just dont get WHEN meiosis happens instead of mitosis. please help!!!!

2007-01-04 10:11:58 · 4 answers · asked by Rosalyn Marie 2 in Biology

create a list of where nitrogen is found in nature and biological system?

2007-01-04 10:10:19 · 15 answers · asked by malutty92 2 in Botany

What happens if a detector is more sensitive?

2007-01-04 10:09:52 · 2 answers · asked by AAAtrp 1 in Engineering

the same size as the one that killed the dinosaurs. what would happen ?..

2007-01-04 10:09:28 · 12 answers · asked by Jerry 2 in Astronomy & Space

No stupid answers... college level algebra.

2007-01-04 10:08:56 · 8 answers · asked by girl_pink 1 in Mathematics

2007-01-04 10:07:28 · 8 answers · asked by badpunman 2 in Zoology

It's about making polymers and its chemistry

2007-01-04 10:07:11 · 7 answers · asked by Anonymous in Chemistry

Please describe the formation of the Hawaiin Islands. You know with the underwater volcanoes and the hot spot thing. THNX

2007-01-04 10:05:53 · 5 answers · asked by Anonymous in Earth Sciences & Geology

I'm doing a project in my physics class where we have to build a DC motor powered by one AA Battery.

Mine didn't work, and I need to find the answers to these questions.

-What happens to the direction of the motor's spin when the battery is placed in the opposite direction?
-What will happen to the direction of the spin of the motor if the commutator is rotated 180 degrees?
-What will happen if the commutator is placed in the same plane as the armature?
-What happens if you connect 2 batteries to the motor? 3 batteries? A 6V battery?
-How would you redesign the motor so it could run on 15 Volts?

2007-01-04 10:05:36 · 3 answers · asked by zburritoman 1 in Physics

please give me a link or copy here a graph of function f(x)=(sinx)2 {this 2 means that's square}, thanks

2007-01-04 10:05:24 · 2 answers · asked by Chris 2 in Mathematics

i think so, because if they told everyone straight up then both scenarios would occur.
1:People would freak out and go crazy(Apocalypse)
2:Major Car Companies would lose money and have to make more money building cars that dont destroy the O-Zone Layer.
So they wait til the last moment when Earth is beyond repair and fire is crashing from the sky from God. Punishment is harsh, but people dont believe this will happen, because Politics are crap.
Yeah sure cars were one of the best inventions for transportation, and its every 17 years old dream, but it gets old, and its been too long, and time has passed and these Dreams will cause a Nightmare, if we dont stop it. This world we live in will be hell. People die, People Cry, time passes on, emotions hide

2007-01-04 10:05:12 · 7 answers · asked by Anonymous in Weather

2007-01-04 10:04:45 · 5 answers · asked by ryan h 1 in Geography

i checked in the back of the book and it said x=-2

the question says:
write in slope intercept form the equation of the line passing through the given point and perpendicular to the given line.

so it give
(-2,2), y=7
so i sub in 2 for y1 and -2 for x1,
the opposite reciprocal is -1/7
y-2=-1/7(x--2)
or
y-2=-1/7(x+2)
so i distributed
-1/7(x)= -1/7x and -1/7(2)=-2/7
y-2=-1/7x-2/7
then i added 2 to both sides leaving
y=-1/7x-2/7
and the answer in the back is x= -2
what did i do wrong

2007-01-04 10:04:43 · 7 answers · asked by Metalhead4Ever 2 in Mathematics

2007-01-04 10:04:16 · 2 answers · asked by Anonymous in Mathematics

2007-01-04 10:03:04 · 2 answers · asked by siennagage 1 in Biology

i checked in the back of the book and it said x=-2

the question says:
write in slope intercept form the equation of the line passing through the given point and perpendicular to the given line.

so it give
(-2,2), y=7
so i sub in 2 for y1 and -2 for x1,
the opposite reciprocal is -1/7
y-2=-1/7(x--2)
or
y-2=-1/7(x+2)
so i distributed
-1/7(x)= -1/7x and -1/7(2)=-2/7
y-2=-1/7x-2/7
then i added 2 to both sides leaving
y=-1/7x-2/7
and the answer in the back is x= -2
what did i do wrong

2007-01-04 10:00:38 · 1 answers · asked by Metalhead4Ever 2 in Mathematics

No stupid answers... college level algebra.

2007-01-04 09:57:08 · 3 answers · asked by girl_pink 1 in Mathematics

No stupid answers... college level algebra.

2007-01-04 09:56:27 · 6 answers · asked by girl_pink 1 in Mathematics

I don't know where to find the answer for this question and appreciate any help. If you know of any other resources that might help me understand why or how this works I would appreciate that as well.
Thanks :D.

2007-01-04 09:54:17 · 2 answers · asked by Anonymous in Biology

I am thinking about buying the PURTEST® BACTERIA, NITRATE, NITRITE TEST KIT, if anyone has ever used it is it reusable?

2007-01-04 09:53:20 · 1 answers · asked by HELLO123 3 in Biology

been informed that light gaps in between photons reflects of dust particals therefore filling the spaces so therefroe the beam is then intact as a beam!!!! and not a series of seperate photons with spaces , but wot if a space is not filled with a dust particle but is empty as in say a vacum , it this space then in total darkness and what then happens to these spaces in my first question come on guys i need convincing here also but dosent light only reflect of something when it hits it and not until ?

2007-01-04 09:49:18 · 12 answers · asked by fragmaster3sum 2 in Physics

2007-01-04 09:47:52 · 11 answers · asked by batista~rox 1 in Earth Sciences & Geology

h = r/t (p - m) ---solve for r---

y = bt - c ---solve for b---

P - 2L + 2w ---solve for L---

g - 1.9 m/r2 (r2 as in r to the second power) ---solve for m---

2007-01-04 09:47:11 · 7 answers · asked by Anonymous in Mathematics

for the cross of a heterozygous black guinea pig and an unknow guinea pig whose offspring include a recessive white furred individual. What are the possible genotypes of the unknown parent?

2007-01-04 09:46:16 · 3 answers · asked by 000123 2 in Biology

Could there be dinosuars alive (even small ones) in some remote African jungle?

2007-01-04 09:46:06 · 4 answers · asked by Anonymous in Zoology

1 One egg costs 5.5 cents. How much will two dozen eggs cost? a) $1.11 b) $1.21 c) $1.32 d) $1.43 e) $1.44

2. If all Sykes are Gords, and some Sykes are Hiffs, the statement "Some Gords are Hiffs" is a)true b) false

3)What is seven times the square root of sixty-four divided by two? a) odd b) even

4)Which of the following does not belong? a) truculent b) fierce c) tumultous d) brutal e) placid

5. page is to book as computer is to a)network b)person c) user d)keyboard e) mouse

2007-01-04 09:45:39 · 22 answers · asked by Anonymous in Other - Science

A heavy-duty stapling gun uses a 0.184-kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff spring called a "ram spring" (k = 36352 N/m). The mass of this spring may be ignored. Squeezing the handle of the gun first compresses the ram spring by 3.5 10-2m from its unstrained length and then releases it. Assuming that the ram spring is oriented vertically and is still compressed by 1.4 10-2m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact.
___________ m/s

help would be appreciated, even if you can just get me started in the right direction.

2007-01-04 09:44:19 · 2 answers · asked by lifewithgooli 1 in Physics

soem questions are-

If the number of protons are equal to the number of electrons, the overall charge of the nucelus would be __

Chlorine has a high electron___ because it attracts electrons easily


In an electron dot-diagram, just the ___ electrons are illustrated


in mettallic bonds, many electrons are__ by many atoms

True or False:

chemical bonding is the process of atoms combining to form new substances

the thrid energy level can hold up to as many 14 electrons

2007-01-04 09:44:13 · 5 answers · asked by Anonymous in Chemistry

2007-01-04 09:42:58 · 18 answers · asked by Moon Man 5 in Geography