Science & Mathematics - 6 February 2007

If a defense missile intercepts an incoming missile tipped with a nuclear warhead will the warhead be disabled or could there be an atomic explosion in mid air? Would there be radioactive fallout that spreads for hundreds of miles contaminating more people?

2007-02-06 07:15:40 · 6 answers · asked by Samuel L 2 in Engineering

Is this reasonable?

This was on my clinical psych test today. It has something to do with norms. 10 points...who can answer this?

2007-02-06 07:15:16 · 2 answers · asked by Anonymous in Mathematics

I have a medical uni interview and was wondering what the differences between primary care level patient management and secondary level patient management was (difference in patient care in GP surgeries and hospitals) Thanks so much for all your help xXx

2007-02-06 07:14:46 · 2 answers · asked by Star dust 4 in Medicine

2007-02-06 07:13:46 · 12 answers · asked by sparkydogg222 1 in Biology

2007-02-06 07:13:40 · 5 answers · asked by freeriderss 5 in Earth Sciences & Geology

2007-02-06 07:10:31 · 5 answers · asked by Tawnie B 1 in Astronomy & Space

2007-02-06 07:09:12 · 2 answers · asked by andrea b 1 in Earth Sciences & Geology

I know that these are relatively easy questions, but I'm having some difficulty with them.

How much work does the electric field do in moving a proton from a point with a potential of +1.30E2 V to a point where it is -25 V? Express your answer both in joules and electron volts.


How much kinetic energy will an electron gain (in joules and eV) if it accelerates through a potential difference of 2.2E4 V in a TV picture tube?


for the first one i've tried using the equation PEb-PEa=-Wba, and i'm not getting the right answer.

the second one im not really sure how to work it.

Any help will be greatly appreciated!

2007-02-06 07:08:27 · 1 answers · asked by number1toolfool 2 in Physics

we know that the inner shell can only hold 2 electrons and an outer or secondry shell can only hold up to eight electrons- does this mean that an atom of thorium has 11 outer shells?
and please before the dissinterested souls come back with silly quips - I am trying to learn!

2007-02-06 07:08:22 · 8 answers · asked by Anonymous in Chemistry

2007-02-06 07:07:42 · 4 answers · asked by paul.john84 1 in Earth Sciences & Geology

evaluate the integral of these please :) the second one is definite the first and last are not.

1. -2x/(x+1)(x^2+1) dx

2. (this one is a definite integral)
e^x/(1+e^2x) dx evaluated from 0 to the ln x
3. e^x*sin(x) dx

2007-02-06 07:07:01 · 3 answers · asked by superzack64 2 in Mathematics

Exponential equations
27=3^5x x 9^x2, 28^x=10^-3x, 1000e^.09t=5000, xe^3x -1 = 3, ln x^2 = -x^2

2007-02-06 07:06:03 · 1 answers · asked by shadow6741 1 in Mathematics

2007-02-06 07:06:02 · 2 answers · asked by Yup 1 in Chemistry

2007-02-06 07:05:54 · 7 answers · asked by Tellme 1 in Zoology

2007-02-06 07:05:23 · 1 answers · asked by saam 1 in Zoology

1 - How are poisonous oxides of nitrogen formed in a car engine?

2- Lead compounds are added to petrol to improve its efficiency why/how does this cause pollution problems?

3- How can pollution caused by lead additives in petrol be removed?

4- Carbon and carbon monoxide are pollutants formed by inefficient combustion of petrol - how could the efficiency be improved?

2007-02-06 07:03:20 · 6 answers · asked by Anonymous in Chemistry

2007-02-06 07:02:31 · 5 answers · asked by Anonymous in Mathematics

I have two chem problems that I just cannot figure out. They are on Ideal Gas Law problems.
Please provide with me work (so i can see how to do it) and an answer.

1) 4.5g of magnesium is reacted with hydrochloric acid to produce hydrogen gas and a solution of magnesium chloride. What volume of gas would be produced at 2.5 atm and -8 degrees Celsius? PH20=2.5 mm Hg at -8 degrees Celsius

2) The density of a gas at room temperature (21 degrees Celcius) is 2.44 g/L. If the pressure of the gas is 0.178 atm what is the MM of the gas? (HINT: Does the density of a gas change based on the size of the sample?)


THANK YOU SOOO MUCH!

2007-02-06 07:00:23 · 2 answers · asked by Remy 5 in Chemistry

2007-02-06 06:58:17 · 13 answers · asked by Fibonacci01123 3 in Astronomy & Space

I'm kinda lost on this problem, and i have test on it tommorow.
Please any kind of help would be amazing!

Solve the Initial value problem

dy/dx =4y^1/2 ln x /x

y(e)=1

2007-02-06 06:57:55 · 4 answers · asked by soccerplaya91101 1 in Mathematics

How do I divide this fraction when the answer needs to be written in scientific notation

68 * 10^(-12)
-----------------
8.5 * 10^(-5)


I for the life of me cannot figure out this division problem

24m^4n^2-8m^2n^3 +4m^3n
------------------------------------
4m^2n


Please help

2007-02-06 06:57:46 · 4 answers · asked by CookFrNW 3 in Mathematics

I was asked weather or not you may use 240V on site buy using an R.C.D as opposed to 110V

2007-02-06 06:57:26 · 9 answers · asked by fletwat 1 in Engineering

2007-02-06 06:56:29 · 16 answers · asked by Anonymous in Chemistry

I need specific diameters and focal lengths, and cannot find any resources on the internet.

Thank you

2007-02-06 06:53:56 · 6 answers · asked by Anonymous in Astronomy & Space

I have a frdidge magnet if that helps.

2007-02-06 06:53:37 · 19 answers · asked by beachloveric 4 in Earth Sciences & Geology

I need help and I must have stupidly forgot how to make lowest terms Question 15/27 lowest terms = ?

2007-02-06 06:52:58 · 13 answers · asked by Jessica 2 in Mathematics

2007-02-06 06:52:42 · 1 answers · asked by Anonymous in Geography

2007-02-06 06:51:02 · 2 answers · asked by Connie L 1 in Engineering

Fill in the blank

2007-02-06 06:50:18 · 4 answers · asked by Anonymous in Physics

2007-02-06 06:49:55 · 6 answers · asked by stephanie j 1 in Mathematics