Science & Mathematics - 5 November 2007

I spent away too much time trying to figure that one out . Can I get a clue or something please
Problem:
logx + log(x-9) = 1

2007-11-05 11:14:06 · 1 answers · asked by D M 1 in Mathematics

2007-11-05 11:14:05 · 5 answers · asked by joshsr0909 2 in Weather

I am really confused on how to do these problems. i know you use the chain rule but I am not getting the correct answers. thanks so much if you can help and expain how to do it:

1)
f(x) = ln(5sinx^2)
f ' (x)=?

2)
F(y) = yln(9 + e^y)
F '(y)=?

3)
y = (ln (3x))/x^3
y'(x)=?
y"(x)=?

4)
This one is find an equation of the tangent line to the curve at the point (4,0)
y=ln(x^2 - 15)
y=?

5)
y=(sin4x)^lnx
y'=?

Thanks so much for any help you can give, I would really appreciate it!!!!

2007-11-05 11:12:27 · 2 answers · asked by bballchic6798 2 in Mathematics

2007-11-05 11:10:16 · 2 answers · asked by Avenged Sevenfold = My Heart 1 in Earth Sciences & Geology

2007-11-05 11:07:13 · 1 answers · asked by Anonymous in Mathematics

here is the science question being asked.

-why is it that when no external force acts, momentum doesnt change, but it is conserved?



i know, it's dumb.

2007-11-05 11:04:39 · 5 answers · asked by alyssa_17t 1 in Physics

Do they see a different side than I see here in the US?

2007-11-05 11:01:41 · 15 answers · asked by gumby 7 in Astronomy & Space

2007-11-05 11:01:38 · 3 answers · asked by Anonymous in Physics

Why does a child in a wagon seem to fall backward when you give the wagon a sharp pull?

Please explain answer in 2-3 sentences clearly.

2007-11-05 11:01:03 · 3 answers · asked by nirmal 1 in Physics

I understand both of these to be teeth on a gear. Am I mistaken? Please enlighten me.

2007-11-05 10:58:22 · 3 answers · asked by Anonymous in Other - Science

2007-11-05 10:58:07 · 2 answers · asked by Mac 2 in Chemistry

A star has an Apparent Visual Magnitude of +8 and a stellar parallax of 0.0251 second of arc. What is the approximate value of the Absolute Visual Magnitude of this star?

A. +2.51
B. +3
C. +5
D. +7

2007-11-05 10:57:48 · 3 answers · asked by tdoby3 2 in Astronomy & Space

2007-11-05 10:55:35 · 8 answers · asked by Ferrari vs Mclaren 1 in Astronomy & Space

I mean the winds as globally, not local. I know it has to do with the way that the Earth spins.

2007-11-05 10:55:22 · 4 answers · asked by Anonymous in Weather

I mean the winds as globally, not local. I know it has to do with the way that the Earth spins.

2007-11-05 10:55:02 · 2 answers · asked by Anonymous in Earth Sciences & Geology

If I'm lost does anyone know of a way to tell which way is north.... without the use of a compass.

2007-11-05 10:54:46 · 6 answers · asked by Ian R 1 in Earth Sciences & Geology

Ok. What if there was no mantle or core in the Earth, it was all crust. And You dug to the center of the Earth. Now someone on the other side of the world digs a hole opposite of your hole. If someone falls into your hole then what would happen when they reached the center? Gravity is still in play here. Wouldn't you just float in the middle? The exact middle?

2007-11-05 10:50:36 · 3 answers · asked by Anonymous in Physics

I need answers now plez!!!

2007-11-05 10:50:10 · 2 answers · asked by ckapololu 1 in Earth Sciences & Geology

Edward Palonek asks can you explain in plain english what the "colour" of a quark is, what it does and what its properties are? Thanks
http://palonek.ca/

2007-11-05 10:49:12 · 3 answers · asked by Edward Palonek™ 2 in Physics

African Lion vs Grizzly Bear

2007-11-05 10:48:11 · 12 answers · asked by Mike W 3 in Zoology

(milk, soda, juice, etc.)

2007-11-05 10:47:34 · 4 answers · asked by hawaiian_angel_808 1 in Botany

I do not get it. Please explain it in the most detail as possible cause Ive been on several websites and still dont understand. Examples would be really appreciated, they help me to understand! Thank You!

2007-11-05 10:47:18 · 1 answers · asked by Me 3 in Chemistry

a. hormones may be used at a distance from where the hormones are made.
b. hormones have a slower effect than that mediated by the nervous system
c. hormones bind to receptor sites at a target cell

2007-11-05 10:46:52 · 3 answers · asked by farah m 1 in Biology

A few moments ago while teaching my girlfriend about pressure points and reflex she relayed to me that she had never, "kicked" upon stimulation of the tendon below her kneecap. She is perfectly healthy and has never sustained any spinal injury thus I told her that this wasn't possible. She clearly has feeling in all extremities and shows no outward indication of any type of nerve difficiency.

Taking this into account I believed her to be incorrect in her claim and I had her sit on a bench where I proceded to check for her knee jerk reflex. She absolutely does not respond to stimulous in the required location. Upon feeling below her kneecap with my fingers she states that she feels a tickle, but there is no sensation whatsoever which signals a reflex or an abnormally located tendon.

I'm a fairly intelligent individual but I can't explain this with my level of understanding in the area of human biology. Any help is appreciated.

2007-11-05 10:45:10 · 6 answers · asked by Jake B 4 in Biology

2007-11-05 10:41:16 · 1 answers · asked by Isela M 1 in Biology

Its annoying to have to get used of one thing and then it changes. Farmers work from sun up to sun down so why would we have to change the times. I think its just annoying.

2007-11-05 10:41:00 · 6 answers · asked by nerdboy 4 in Astronomy & Space

A 1270 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1860 N crate hangs from the far end of the beam

(a) Calculate the magnitude of the tension in the wire. Newtons

(b) Calculate the magnitude of the horizontal and vertical components of the force that the wall exerts on the left end of the beam

Fx = N
Fy = N

http://img107.imageshack.us/img107/9378/p966altcu2.gif

2007-11-05 10:36:42 · 1 answers · asked by Anonymous in Physics

The purpose of this question is in regard to the possiblity of life forming on another planet where there is no water present.

2007-11-05 10:36:09 · 2 answers · asked by jeffdanielk 4 in Chemistry

Sciencetest's years ago say that the world will end. What is your theory?

2007-11-05 10:36:06 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-05 10:35:00 · 4 answers · asked by DeeDee 1 in Chemistry