Science & Mathematics - 31 December 2007

I'm supose to do a project on it but I don't understand it.
Fritz and Otto discovered that an isotope of barium was produced by neutron bombardment of uranium with netrons. Can anyone tell me why and how they did this?

2007-12-31 04:56:35 · 2 answers · asked by curly* 2 in Chemistry

In a population of rabbits, white fur is caused by the recessive allele g, and the dominant gray by G. If 36% of the population express the homozygous recessive white condition, what is the frequency of the dominant allele, G, in that population?

A. .64

B..06

C..60

D. .04

E. .40

2007-12-31 04:54:39 · 2 answers · asked by Anonymous in Biology

was its last thoght that it built its web wrong

2007-12-31 04:47:42 · 4 answers · asked by Anonymous in Zoology

2007-12-31 04:47:37 · 1 answers · asked by Anonymous in Chemistry

... meters per second squared. How long will it take the rocket to reach an altitude of 9.0 X 10^3 meters?

2007-12-31 04:45:11 · 2 answers · asked by C0D3T4LK3R 2 in Physics

If the air becomes cooler, some of the water vapour will condense into a liquid. What do condensation nuclei have to do with this process?

2007-12-31 04:44:01 · 2 answers · asked by GEORGE M 1 in Weather

There are herbal high pills in the uk containing the follwoing ingredients. Ketones,dicalcium, phosphate, magnesium and sterate. What effect will these have on the body? will there be any negative effects on the heart etc? obviously they are sold over the counter so they are fit to consume but are there any negative effects on the body? or effects people with certain conditions should avoid?

2007-12-31 04:43:16 · 6 answers · asked by Mark E 1 in Chemistry

2007-12-31 04:41:59 · 20 answers · asked by ultravezz 2 in Astronomy & Space

please help

2007-12-31 04:41:17 · 2 answers · asked by GEORGE M 1 in Earth Sciences & Geology

chem hw =.= i suck at chem. so can anyone plz tell me what particular type of element is magnesium attracted to? metals, non metals, gas etc...

2007-12-31 04:39:54 · 5 answers · asked by zmtz28 1 in Chemistry

answer: Protons (??)

another question:

a very stabel electron arrangement in the outer energy level is characteristic of what?

2007-12-31 04:37:55 · 2 answers · asked by Anonymous in Chemistry

Please help!!!!

2007-12-31 04:33:00 · 1 answers · asked by GEORGE M 1 in Earth Sciences & Geology

yes or no and explain

2007-12-31 04:31:43 · 4 answers · asked by lil diamond 1 in Earth Sciences & Geology

I'm trying to print out all 1000 combos of 3 digits so I can open my briefcase lock. Can someone show me the excel formula to do so?

Thanks!

2007-12-31 04:31:34 · 6 answers · asked by Anonymous in Mathematics

Homework help!!!!

2007-12-31 04:31:15 · 5 answers · asked by GEORGE M 1 in Weather

A.10 TO THE POWER OF -4=10,000
B.10 TO THE POWER OF -4= -0.0001
C.10 TO THE POWER OF -4= 0.0001
D.10 TO THE POWER OF -4= -10,000

2007-12-31 04:30:56 · 12 answers · asked by Anonymous in Mathematics

The student used the textbook formula, and derived their relative velocity w.

After that, the student used the calculator, and found that
cosh(artanh(v/c)) = 7, and
cosh(artanh(u/c)) = 11.

What is the value of
cosh(artanh(w/c))?

2007-12-31 04:29:13 · 2 answers · asked by Alexander 6 in Physics

I want to find out how much money it will cost [in gas ] to drive 20.22 miles exactly. That is going one way, so I need to know how much it will cost both ways, with the gas price being ( at the highest ) $ 3.35.

So gas price: $ 3.35
Distance: 20.22 Miles One Way
Distance: 40.44 Miles Both Ways


How much will it cost to go to this place in all?

I really don't know how to do this and it has nothing to do with math homework. I need to find the price to volunteer at an animal shelter every weekend to see if I can afford to pay the person driving me.

2007-12-31 04:29:08 · 6 answers · asked by Anonymous in Mathematics

since everthing is expanding from that point? so wouldn't the universe be more like a bubble. with only matter on the outer bubble

2007-12-31 04:28:13 · 16 answers · asked by Anonymous in Astronomy & Space

The question ask me to convert 35.78° into radian. But I don't know how to convert it. Can i just round the number into 36° and solve it??? Please help!!!

2007-12-31 04:26:08 · 7 answers · asked by Anonymous in Mathematics

70% of the students in the class do homewok three or more nights each week. Of the students who do homework three or more nights each week, half do homework five nights each week.

A. What fraction of the students in the class do homework five nights each week? Explain you reasoning.

B. What percantage of students in the class do homework. three or four nights a week? Explain your reasoning.

C. From the information provided, can you tell how many students are in the class? Explain why or why not.

2007-12-31 04:23:27 · 2 answers · asked by Anonymous in Mathematics

Does anyone have the exact number for the populations of giraffes from 2003 until 2007?

2007-12-31 04:21:47 · 1 answers · asked by ksmjl4 1 in Zoology

the formula x(t)=lnt + (t^2/18) + 1 gives the position of an object moving along the x-axis during the time interval 1 ≤t ≤ 5. At the instant when the acceleration of the object is zero, the velocity is
a)0
b)1/3
c)2/3
d)1
e)undefined

2007-12-31 04:19:49 · 9 answers · asked by affy 2 in Mathematics

What's the difference between a fat and a sugar? Can we burn them both by oxphos? Oxphos is oxidative phosphorylation right?, this means adding oxygen to stuff and reducing it, making it less reactive, is this correct? Or can we add H as well?

2007-12-31 04:19:21 · 1 answers · asked by Phil S 1 in Earth Sciences & Geology

Help? I know its a double angle equation, but none of the formulas seem to get the correct answer. The only instructions are to find the exact solutions of the equation in the interval [0,2pi)

2007-12-31 04:13:47 · 6 answers · asked by em.four 2 in Mathematics

Also, what are reducing equivalents?

2007-12-31 04:13:15 · 2 answers · asked by Phil S 1 in Chemistry

For example:

C3H6
--> comes from the formula CnH2n

This can indicate that it is a ring structure or an alkene. It can be either cyclopropane or propene. How do you know which one it is, given only the molecular formula (C3H6)?

2007-12-31 04:11:00 · 7 answers · asked by Anonymous in Chemistry

I've not studied chemistry before and get confused when I see diagrams with arrows and elements. Are you able to give me a simple example to work through, explaining the need to balance in the first place. Maybe dissolving salt into water? Something like that would be great. I know water is H2O, salt is CaCl2+ (I think?) or perhaps you have a better example to use?

2007-12-31 04:10:34 · 3 answers · asked by Phil S 1 in Chemistry

2007-12-31 04:10:19 · 12 answers · asked by Anonymous in Mathematics

If you could break the law of physics, what would you do and why?

2007-12-31 04:08:20 · 3 answers · asked by skilled frycook 1 in Physics