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Science & Mathematics - 23 October 2006

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how do I know which is the correct order in ANY iterated integral: dxdy or dydx?

also, how do I do this one:
SSR x(x-1)e^(xy)dA where R is a triangular region bounded by x=0, y=0, x+y=2

2006-10-23 13:41:20 · 2 answers · asked by Anonymous in Mathematics

In other words, if I had piece of material that is 1 foot by 1 foot, and I put it in a river flowing at 3 MPH so that it is perpendicular to the water flow, how many pounds of pressure would be on that square?
Thanks!

2006-10-23 13:40:42 · 1 answers · asked by danzunko 2 in Physics

A student determined that one of the lines in the hydrogen atom spectrum had a wavelength for which the calculated photon energy was 4.1 x 10-19 joules. To what electronic transition in the hydrogen atom should this line be assigned?

a. 7 - 2
b. 6 - 2
c. 5 - 2
d. 4 - 2
e. 3 - 2

I am not even sure what it is asking me to do?

2006-10-23 13:40:08 · 3 answers · asked by Anonymous in Chemistry

this is my science question so get me answers ASAP!

2006-10-23 13:36:56 · 13 answers · asked by afishatemysandwich 1 in Other - Science

2006-10-23 13:36:17 · 10 answers · asked by Mr.RIGHT 2 in Mathematics

2006-10-23 13:36:02 · 8 answers · asked by Eric j 1 in Mathematics

2006-10-23 13:35:04 · 8 answers · asked by jessica p 1 in Weather

2. Explain how to solve ax+b=0 for x.
B. Check these solutions to equations by substituting the numbers into the equations.Note any wrong"solution".Explain how to solve the equation correctly.
1. 5r=320,r=64
2. 2x-3=13,x=8
3. 0.9x=7.2,x=8

2006-10-23 13:33:49 · 5 answers · asked by thelmadc06 1 in Mathematics

how dose a glass sweat. how dose the water get on the out side of the glass

2006-10-23 13:33:32 · 9 answers · asked by dnn_draper 1 in Other - Science

Answer for below questions for the following ion


F2+


a) how many electrons are in bonding orbitals?
b) how many electrons are in antibonding orbitals?
c) what is the bond order of the ion?

2006-10-23 13:29:48 · 2 answers · asked by MARK 2 in Chemistry

what is yoour personal opinion on this matter: to the inequality X<-2
is there an infinate number of solutions? tak into consideration how the numbers -2 and up are not included

2006-10-23 13:28:57 · 3 answers · asked by hmmm?? 3 in Mathematics

?? I am trying to enter a contest, but I am trying to think of something smart. Things that follow laws, like "equal and opposite reaction" where some guy is bumping into two other guys.. stuff like that. what should i do?

(The more complicated the better)

2006-10-23 13:28:08 · 6 answers · asked by Anonymous in Physics

The Alan Company bought 80 tickets for a jazz concert. After giving away 20 tickets to customers, the company sold the rest to employees at half the purchase price. If the company absorbed a $1000 loss on all the tickets, how much did an employee pay for a ticket?
A.$10 B.$12 C.$15 D.$1

2006-10-23 13:27:42 · 5 answers · asked by Anonymous in Mathematics

i cant find any good sources for this topic
please give detail if you can

2006-10-23 13:23:21 · 5 answers · asked by Bru 3 in Earth Sciences & Geology

why can we breed dogs of many sizes and shapes but not cats? cats are generally small while dogs can be a few inches long or 1m in height.

2006-10-23 13:23:20 · 19 answers · asked by szx 2 in Biology

2006-10-23 13:23:01 · 5 answers · asked by The REBELution! 3 in Weather

"A manufacturer wants to design an open-top box having a square base and a surface area of 120 square inches. What dimensions will provide a box with maximum volume?
Length of base ?
Width of base?
Height of box ?"

I have no idea where to even begin! HELP!

2006-10-23 13:21:25 · 3 answers · asked by flaquita 1 in Mathematics

does it take to answer a question
you win a prize

2006-10-23 13:20:49 · 12 answers · asked by Anonymous in Mathematics

2006-10-23 13:18:52 · 3 answers · asked by Anonymous in Mathematics

2006-10-23 13:17:08 · 26 answers · asked by Anonymous in Biology

calicite is a minral

2006-10-23 13:17:03 · 6 answers · asked by Anonymous in Other - Science

i have to do a thing for school about how much time i spend a day doing things.....if i put the numbers into Microsoft Excel can it do it for me this is basiclly wht i have to do
School-7 hours
Sleep-8 hours
Free time - 2 hours
Homework- 1 hour
so how do i change the time into precent

2006-10-23 13:17:02 · 17 answers · asked by Anonymous in Mathematics

2006-10-23 13:13:59 · 3 answers · asked by uzi_wuz88 1 in Biology

2006-10-23 13:13:56 · 4 answers · asked by Anonymous in Geography

((([N S]))) | ((([N S])))

The material needs to act as a shield between two magnets to keep them from being attracted to each other. Likewise, they can't be attracted to the shield, either (which rules out Mumetal, Ni, Co, etc.)

2006-10-23 13:11:48 · 5 answers · asked by 'Ric 2 in Physics

2006-10-23 13:08:00 · 13 answers · asked by martin 1 in Medicine

2006-10-23 13:06:56 · 9 answers · asked by Anonymous in Mathematics

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