Science & Mathematics - 13 July 2007

here's my problem i have a few teachers who taught me "standard form" is "y=a+bx" , and 1 who reacently taught me that it is "Ax+By=C"..... which one is correct? back up your answer too please

2007-07-13 03:15:54 · 10 answers · asked by The Prophyt 2 in Mathematics

plz . jelp if u can realize that i am worried >>>>>>>>

2007-07-13 03:01:04 · 8 answers · asked by 88 1 in Biology

Please Help

2007-07-13 03:00:44 · 4 answers · asked by Stan 2 in Biology

As the rain cloud are too heavy to support by air, they fall to the ground. Why they don't just simply splash to down, but in shower form?

2007-07-13 03:00:31 · 2 answers · asked by Lai Yu Zeng 4 in Weather

I'm stuck on these two problems.

Someone showed me how to do one of these the other day when I asked, and I thought I would be able to do the rest after getting an answer, but I don't see what to do when the initial conditons don't have a zero in the parentheses.

btw - the answers the book gives are:

for the first one:

Eigenvalue λ[subscript 0]=0 with eigenfunction y(x)[subscript 0]≡1, and positive eigenvalues {n^2/4} for n = 1,2,3 ...

The nth eigenfunction y[subscript n](x) is sin(nx/2) if n is odd, cos(nx/2) if n is even.

for the second one:

Only positive eigenvalues {n^2π^2/64} for n = 1,2,3...

The nth eigenfunction y[subscript n](x) is cos(nπx/8)+sin(nπx/8) if n is odd, cos(nπx/8)-sin(nπx/8) if n is even.

Any help would be greatly appreciated.

2007-07-13 02:58:51 · 2 answers · asked by grompfet 5 in Mathematics

2007-07-13 02:55:30 · 17 answers · asked by tracyterry 3 in Astronomy & Space

2007-07-13 02:48:38 · 3 answers · asked by lindasalicea 1 in Mathematics

2007-07-13 02:42:02 · 14 answers · asked by old school 2 in Biology

What are the main macromolecules and polymers that are essential for life on earth? also, really briefly, why are they so essential?

2007-07-13 02:22:08 · 12 answers · asked by Anonymous in Biology

2007-07-13 02:18:43 · 13 answers · asked by Anonymous in Physics

A. 15 A
B. 20 A
C. 25 A
D. 30 A

2007-07-13 02:18:36 · 2 answers · asked by d.o.g 1 in Engineering

A. plain solder without flux.
B. both plain solder and an acid.
C. acid-core solder only.
D. rosin-core solder only

2007-07-13 02:14:38 · 2 answers · asked by d.o.g 1 in Engineering

2007-07-13 01:49:11 · 2 answers · asked by Anonymous in Engineering

The ends of the rope are at the same height h, and at a horizontal separation d.

2007-07-13 01:48:22 · 4 answers · asked by John S2005 3 in Mathematics

After turning on the kettle for a few seconds a loud noise starts emitting but looking inside, the water is still. What is making the sound.

2007-07-13 01:40:18 · 3 answers · asked by alissandra v 1 in Physics

Basically i have a figure of 34,161.78, which increases to 75,000. How do i find out what the increase is as a percentage?

2007-07-13 01:33:46 · 10 answers · asked by Jiggy_O 2 in Mathematics

2007-07-13 01:26:19 · 10 answers · asked by G.xi 1 in Astronomy & Space

tell me it is that I have always ate a healthy diet, looked after myself checked my weight and cholestrol levels and yet I get everthing going whereas my pal has neglected herself and abused her body by smoking etc and she has only ever been I'll twice in her long life. Though I'm pleased for her but not very pleased for myself.

'Lifes a ***** and then you die'....lol

2007-07-13 01:23:32 · 9 answers · asked by Anonymous in Medicine

Why? Is it the barometric pressure change?

2007-07-13 01:19:44 · 3 answers · asked by beckoningsubstitutes 5 in Chemistry

What problem can a person have if a little time after eating or drinking his waist starts paining?Is it very serious??

Thank U.

2007-07-13 01:19:19 · 3 answers · asked by Anonymous in Medicine

/x-2/ = x-2

/2x-3/ = 3-2x

2007-07-13 01:18:24 · 3 answers · asked by mosdef 2 in Mathematics

I'm looking to a career in mechanical engineering. What needs to be done?

2007-07-13 01:14:25 · 3 answers · asked by ? 2 in Engineering

2007-07-13 01:11:56 · 1 answers · asked by missydedog 1 in Medicine

2007-07-13 00:47:33 · 4 answers · asked by aakash s 1 in Engineering

actually we forgot to add water proof to the plaster and now the walls r plastered what measure can be taken its urgent please be fast

2007-07-13 00:41:21 · 4 answers · asked by sakshi 1 in Engineering

If this actually happened would anyone recognize it as a message from the past? It would not be traveling into the past, but forward into the future and we all travel into the future. What if we in the present send a message into the future, will we ever have our message acknowledged?

2007-07-13 00:40:39 · 6 answers · asked by Anonymous in Physics

If earth's gravitational field collapses for few seconds then what worst or best can happen?

2007-07-13 00:40:24 · 8 answers · asked by 4stars 1 in Astronomy & Space

When did this happen?

2007-07-13 00:33:30 · 3 answers · asked by Roy Nicolas 5 in Astronomy & Space

how to divide 7.5 / 8 without using calculator? how to divide manually?

2007-07-13 00:13:36 · 14 answers · asked by Junji 1 in Mathematics

Hi.
Can someone please help me with the following problems?
1) log (2x^2 + 11x +5) - log (2x+1) = 2
2) log sqrt x^2 +1999 = 3
Can someone please walk me through this step by step?
Thank you!

2007-07-13 00:13:31 · 5 answers · asked by F 6 in Mathematics