Science & Mathematics - 30 January 2007

2007-01-30 21:54:00 · 2 answers · asked by prerna dewan 1 in Geography

is it liquefied petroleum gas (LPG) or something else?
in pakistan gas comes through pipes and it is in the form of air,
and in india, and USA they use LPG, so how do u use LPG if it is not coming through pipe, and how much it costs u per liter
thanks?

2007-01-30 21:52:47 · 3 answers · asked by Qariskaxoor 1 in Engineering

how would i generate a cosine burst of frequency 2Hz, lasting 5 second in MATLAB. need the code.

2007-01-30 21:51:03 · 2 answers · asked by Anonymous in Engineering

2007-01-30 21:50:16 · 0 answers · asked by anish 2 in Biology

2007-01-30 21:49:07 · 3 answers · asked by Yan 1 in Chemistry

2007-01-30 21:45:01 · 18 answers · asked by manicminer2007 2 in Zoology

2007-01-30 21:44:57 · 19 answers · asked by warangal s 2 in Geography

Wondering if anyone could help me answer this swine of a question I have been trying to do for ages.
I am trying to solve a difference equation
u[n+2] + 3u[n+1] + 2u[n]=cos([3x(Pi)xn]/4)
Anyway I found the complementary difference equation easily enough but can't get the particular solution
I put y[p]=Acos([3x(Pi)xn]/4) + Bsin([3x(Pi)xn]/4)
Then I found u[n +1] etc using the compound angle formulaes and subbed into the original equation.
I then compared coefficients of sin and cos.
However my simultaneous equations dont solve to the right answers.
I don't expect anyone to actually do this question but could someone tell me if I am doing the right method?
Thanks.

2007-01-30 21:43:38 · 1 answers · asked by Philip J 2 in Mathematics

2007-01-30 21:35:20 · 5 answers · asked by Anonymous in Medicine

What is the result of burning this mixture in an engine?

2007-01-30 21:23:14 · 1 answers · asked by Updater 1 in Chemistry

2007-01-30 21:19:40 · 3 answers · asked by shaira 1 in Medicine

i am writing a physics report on the use of CCDs and photo film in astronomy, i have done most of it but i am completely stuck on explaining what linearity is. Can someone give me a COMPLETE explanaition of what it is how it works etc. and put it in words that i will understand (cos there are plenty of places i could go if i wanted to be confused). Thanks to anyone that can help, i need it!

2007-01-30 21:19:11 · 4 answers · asked by Anonymous in Physics

2007-01-30 21:18:52 · 15 answers · asked by dipusultan 1 in Weather

2007-01-30 21:17:34 · 8 answers · asked by scholar 1 in Geography

2007-01-30 21:15:50 · 5 answers · asked by freelikeplane 1 in Other - Science

how a device with violet colored tube light captures and kills insects and flys etc.

2007-01-30 21:11:29 · 4 answers · asked by DJ 2 in Engineering

i made this project for my class 12 c.b.s.e. examination. i m getting screwed....how do i prepare for d viva?????help!

2007-01-30 21:07:02 · 2 answers · asked by strangely.disturbed 1 in Physics

2007-01-30 21:06:53 · 5 answers · asked by letsGOtoMARS 1 in Earth Sciences & Geology

2007-01-30 21:06:05 · 3 answers · asked by UAE 1 in Medicine

2007-01-30 21:05:08 · 7 answers · asked by Melanie B 1 in Mathematics

http://www.aapt.org/Contests/pc04full.cfm?Meeting=SM04&Category=Special%20Award&Placing=54

it's about physics, by the way

2007-01-30 21:04:51 · 4 answers · asked by sfaye_hart 3 in Physics

2007-01-30 21:03:02 · 5 answers · asked by jonathan c 2 in Mathematics

Is there any other method of comparison ?
Find the overall percentage of Tarun if he gets the following % of marks : MATHS (150 ) 65
CHEMISTRY (130) 35
PHYSICS (120) 50
GEOG. (100) 77
HIS ( 60 ) 80
COMP (40) 80
The no in the bracket is the max marks in that sub. and outside is the % of marks obtained . I solve it in this way but i got wrong answer
65+35+50+77+80+80 / 700*100 = 64.5 %
Can u tell me what is wrong with this method as I have taken percentage of percentages in various subjects.
I know this is a long question but plz reply . i am very confused about it . THANKS

2007-01-30 21:02:17 · 4 answers · asked by gaurav 1 in Mathematics

1.Write the chemical equation involved in the reaction between concentrated nitric acid (HNO3) and glucose?

2.Cite at least 3 other sugars which will give a positive result in the music acid test? Why will these give positive results?

3.What sugars form the characteristic osazone crystals? How do the crystals differ?

4.What is responsible for the intense blue color formed in the iodine test for starch?

5.What is the purpose of grinding with sand and TCA in preparing glycogen?


...thank you for your effort, God Bless!

2007-01-30 21:00:48 · 1 answers · asked by 'd campus Hearthrob 1 in Chemistry

Career or hobbies which is related to trigonometry

2007-01-30 20:53:58 · 6 answers · asked by Rhea Y 1 in Mathematics

2007-01-30 20:49:45 · 3 answers · asked by mahek s 1 in Engineering

How does the light & Sound energy comes from the cloud

2007-01-30 20:48:58 · 5 answers · asked by Iman, jose 1 in Other - Science

sorry that looks really confusing.. any help please?

2007-01-30 20:48:33 · 4 answers · asked by confused_maths_student 1 in Mathematics

Hey,

If an amino acid is involved in the formation of a sulfur bond, what can you conclude about the molecular formula of that amino acid?

2007-01-30 20:48:30 · 1 answers · asked by Anonymous in Chemistry

How does the light & Sound energy comes from the cloud

2007-01-30 20:47:38 · 4 answers · asked by Iman, jose 1 in Other - Science