Science & Mathematics - 19 November 2007

by substitution method x^2=t and "integratioan byparts" integration is going to infinite.........

2007-11-19 10:03:40 · 1 answers · asked by dasari_biet 1 in Mathematics

2007-11-19 10:03:01 · 10 answers · asked by Pulom 3 in Physics

2007-11-19 10:01:43 · 5 answers · asked by Matt H 1 in Mathematics

2007-11-19 09:59:36 · 9 answers · asked by tina seagraves 2 in Earth Sciences & Geology

2007-11-19 09:55:52 · 10 answers · asked by Anonymous in Weather

2007-11-19 09:54:17 · 7 answers · asked by That's Trippy S2 1 in Mathematics

I need to find the last two digits of 37^1992. The hint is to divide by 100 and find the remainder.

I've looked at similar questions and answers here and elsewhere, but the numbers are much simpler and no one seems to explain how to solve the problem.

Please help.

2007-11-19 09:53:09 · 2 answers · asked by Anonymous in Mathematics

Where time changes with respect to another variable? Are there applications for this (say, time dilation)? Are there instances where t (time) used as a function of another variable?

2007-11-19 09:52:45 · 3 answers · asked by Mitchell 5 in Physics

This may sound stupid but my mind has gone blank on how i would input logs into this equation.

3^x+1 = 15

Note: ^ means the 3 is to the power of x+1

I can use logs with e easy enough but stuck on this.

Throughout explanation would be grateful

2007-11-19 09:52:03 · 4 answers · asked by Paul T 1 in Mathematics

Can you provide real-life ghost stories from your own experience? Real stories please - the real ones give more goosebumps!

2007-11-19 09:51:20 · 27 answers · asked by jlilly26 2 in Paranormal Phenomena

I'm trying to defy evolution.
First of all, there are so many amazing organisms that do miraculous things! How could they've evolved from something else?
Secondly, Darwin said IF his hypothesis was correct our geological column would be FULL of intermediate links. Evolutionists only have a couple HIGHLY questionable ones like Archaeopteryx & Australopithecus afarensis. You would think if creatures evolved evolutionists would have several good fossils. Lets not forget that even Darwin had doubts about his theory! Third, how do you explain structural homology? We now know more about genetics.
You cant add genetic information! The only way it could occur is through mutation but thats a lot of mutation
Molecular Biology? Not much evidence there either. You'd have to ignore 99% of the data and believe 1% of it.1% of data agrees with macroevolution!
And why arent creatures still evolving? Why?
It seems you need more faith to believe Evolution vs. Creation theres such little evidence!

2007-11-19 09:50:28 · 12 answers · asked by Bri 3 in Biology

2007-11-19 09:48:10 · 7 answers · asked by Anonymous in Mathematics

how would you find the center and radius of this equation?? I missed the class, and I don't have the notes yet!! Please help!!

X^2 + y^2 = 16

and could someone please tell me how to MAKE and equation from the points??

Center (0,0) radius =5

Please explain how you get each answer!! I don't just want the answers!! thank you soooooooo much!!!

2007-11-19 09:45:05 · 7 answers · asked by Fuzzyglasses 3 in Mathematics

I get that it should have four bonds and 16 e-
I get the 16 e- part well, six dots on S, two bonds on P, six dots on S, but only with two bonds.

S=N-A
S=(8x3)-[5+(2x6)-1]
S=24-16
S=8 shared e-
S=4 bonds

Help.

2007-11-19 09:44:36 · 1 answers · asked by Pancha Pistolas 3 in Chemistry

Two cars A and B, are travelling with the same speed of 40.0m/s, each having started from rest. Car A has a mass of 1.20x10^3kg and car B has a mass of 2.0x10^3 kg . compared to the work required to bring car A up to speed, how much aditional work is required to bring car B upto speed?

2007-11-19 09:42:31 · 1 answers · asked by dilo247 1 in Physics

You sold tickets to the school play. Advanced tickets were $4. Tickets bought at the door were $5.50. Total ticket sales were $440. Let x represent the nuumber of advanced tickets sold and y represents the number of tickets sold at the door. Write an equation to represent the number of tickets sold.

Here is my equation : 4x+5.5y=440.

then it asked me to find three possible numbers of advanced tickets sold at the door.

How do i solve?

2007-11-19 09:40:36 · 2 answers · asked by mveeyore_luver 4 in Mathematics

The coeeficent of kinetic friction (uk)= 0.2.

A. Draw a feed body diagram of all forces acting on the box.
B. Find the force of kinetic friction.
C. Find the accleration of the box.

The answer for B is fk= 53.75 N
The answer for C is a= 1 m/s squared upwards

I know the answers for the B and C, but I need their work and the answer to A as well

Click link to see a diagram

http://img.photobucket.com/albums/v63/xmattbrettlockx/Physics1.jpg

2007-11-19 09:40:17 · 1 answers · asked by joe s 1 in Physics

2007-11-19 09:40:07 · 9 answers · asked by Anonymous in Mathematics

What stops matter going faster then 185 999mps?

2007-11-19 09:38:55 · 12 answers · asked by futuretopgun101 5 in Physics

Actually i am building a robot car therefore i am looking for the main circuit diagram on web site.so plz if u knows about any usefull web site where i can find robot car circuit diagram,then plz let me know

2007-11-19 09:38:39 · 1 answers · asked by ozi 1 in Physics

_Pb + _HNO3 ---> _Pb(NO3)2 + _NO + _HOH

all the numbers are the suscripts
PLEASE HELP... first answer will get the best answer if its correct! thanks!

2007-11-19 09:37:39 · 2 answers · asked by hellokitty729 1 in Chemistry

How do u factor
2x^2- 7x

2007-11-19 09:37:15 · 3 answers · asked by soccerhotdude101 1 in Mathematics

We're learning about the different phases of matter and my science teacher was telling us that Plasma was the most rare phase on earth but the most common in the universe. I was just wondering if it could actually be made here on earth and how. Well, im not actually wondering...it's a question i have to answer for homework

2007-11-19 09:35:34 · 8 answers · asked by Scented Marker 2 in Physics

whoever knows all about scale factors help me with this problem please suppose there is a dog named duke and duke had a picture and the scale factor fromDuke to the picture is 12.5%.

A. the size of duke from his nose to the tip of his tail is 51/2 iches
b. to build a dog house for Duke you need to know the height so you can make a doorway to accommodate him

So waht im basically asking is how tall is duke and hoe did you come up with that answer

Points top the one who gets it rigth first

2007-11-19 09:34:32 · 3 answers · asked by sekou h 2 in Mathematics

(a) (CH3)3CNH2
(b) CH3NH2
(c) (CH3CH2)3CNH2
(d) all of these

2007-11-19 09:33:02 · 2 answers · asked by MK 1 in Chemistry

The rectangular banquet hall floor has a width that is 7/12 its length and a perimeter of 228 feet. What are the dimensions of the banquet hall floor?

(can someone solve and explain this answer)

2007-11-19 09:32:48 · 2 answers · asked by Kira 2 in Mathematics

When a chemist burns hydrogen according to the reaction below she finds that heat is released. (It is exothermic.)
2H2(g) + O2(g) 2H2O(g)

The enthalpy change for the reaction is H = -484 kJ. What is the enthalpy change per gram of hydrogen (in kJ/g)?

2007-11-19 09:32:16 · 3 answers · asked by Ryan H 1 in Chemistry

The question i am stuck with is 3^x+1 = 15

2007-11-19 09:32:04 · 2 answers · asked by Paul T 1 in Mathematics

Can someone help me out with these review questions? Who gives a test the day before Thanksgiving?! Argh..haha..thanks!!

Show if these series Converge conditionally, converge absolutely or diverge.
(all summation from 1 to infinity)

1. ((-1)^k) / ((k(k+1))^(1/2))

2. ((-1)^(k)(k!)^(2)) / ((2k)!)

3. ((-1)^(k)k!) / (2^(k))

I know there are three options and three questions but it doesn't mean that one is assigned to each, for example they could all converge absolutely. I just have no clue how to prove this and my prof canceled office hours today because it's snowinggggg =O

2007-11-19 09:29:27 · 2 answers · asked by Alysse 1 in Mathematics

One mole of an ideal gas is expanded at T = 300 K from a volume of 1.00 liter to a volume of 10.00 liters against a constant external pressure of 1.00 atm. How much work (in joules) is performed on the surroundings?

2007-11-19 09:27:18 · 1 answers · asked by Ryan H 1 in Chemistry