Science & Mathematics - 16 November 2007

2007-11-16 06:04:02 · 6 answers · asked by Double O 6 in Astronomy & Space

2007-11-16 05:57:45 · 1 answers · asked by aznboi6623 1 in Chemistry

There's a friend of mine, I think he's a genius, I mean he studies day and night and has these wierd habits like writing math equations everywhere and always coming up with wierd ideas, he gets top marks in math and the sciences, but one day I asked him to prove one of the circle theorems in GCSE math which is real easy I proved simply, but he can't seem to prove it. What do you think, is he pretending or is his intelligence just not compatible with things like that?

2007-11-16 05:55:08 · 5 answers · asked by Mandél M 3 in Mathematics

2007-11-16 05:53:05 · 11 answers · asked by Anonymous in Astronomy & Space

2007-11-16 05:52:14 · 8 answers · asked by Anonymous in Astronomy & Space

For the following functions:
(a) Find the intervals of increase or decrease
(b) Find the local maximum and minimum values
(c) Find the intervals of concavity and the inflection points

f(x) = ln (x^4 +27)
f(x) = x + cosx (for x values [-2pi, 2pi])

2007-11-16 05:46:31 · 3 answers · asked by Anniepannie06 2 in Mathematics

Show that the curves y= e^(-x) and y= -e^(-x) touch the curve
y=e^(-x)*sinx at its inflection points.

2007-11-16 05:44:09 · 4 answers · asked by Anniepannie06 2 in Engineering

I've always wondered what the difference is, and since "Cyclones" are in the news today with the tragedy in Bangladesh, I thought I'd ask.

Thanks.

2007-11-16 05:43:41 · 6 answers · asked by DeanTheDream99 1 in Weather

2007-11-16 05:38:08 · 18 answers · asked by bat 2 in Engineering

Okay now I am not sure if I believe in aliens or not...but I guess I do find it hard to believe that we are the only living things in this entire universe. Recently, in upstate new york (I now live in nyc, but used to be from the buffalo, niagara falls area) there have been more and more sightings of possible ufos, especially over the power plant, which generates electricity for most of the east coast. Could this source of energy and the powerful falls itself be an attraction to these "ufos?"

2007-11-16 05:37:09 · 8 answers · asked by Anonymous in Astronomy & Space

2007-11-16 05:35:08 · 5 answers · asked by Clannad 2 in Earth Sciences & Geology

subtract using vertical method.

7x^2+6x from 9x^2-3




add using vertical method.

5x^2+2x-4, x^2-2x-3, and 2x^2-4x-3

2007-11-16 05:32:43 · 6 answers · asked by God Bless America!~ 4 in Mathematics

A small company produces both bouquets and wreaths of dried flowers. The bouquets take 1 hour of labor to produce, and the wreaths take 2 hours. The labor available is limited to 80 hours per week, and the total production capacity is 60 items per week. Write a system of inequalities representing this situation, where x is the number of bouquets and y is the number of wreaths.

2007-11-16 05:31:53 · 5 answers · asked by jaeelarr 1 in Mathematics

can a photovoltaic produce current forever as long as it has light striking it? or does it at some point run out of electrons?

2007-11-16 05:30:52 · 2 answers · asked by Anonymous in Physics

2007-11-16 05:29:27 · 5 answers · asked by MissLady 3 in Weather

Compare the light-gathering powers of one of the Keck telescopes (10 m in diameter) and a 1.5 cm telescope. Keck/1.5 cm =

2007-11-16 05:28:45 · 2 answers · asked by Mike D 2 in Astronomy & Space

2007-11-16 05:28:30 · 3 answers · asked by Anonymous in Geography

are they supposed to be spirits too?

2007-11-16 05:28:25 · 10 answers · asked by mikey 3 in Paranormal Phenomena

I mean with all the cell phones, Wi Fi routers, remote car door unlockers, garage door openers and radio stations, it seems there must be limit to how many frequencies can exist.
Perhaps when we use up the last one, something weird might happen to our brain waves or something.

2007-11-16 05:26:14 · 6 answers · asked by Anonymous in Physics

http://tinypic.com/view.php?pic=7w9qo7l&s=1

2007-11-16 05:25:13 · 5 answers · asked by Anonymous in Mathematics

If the earth is more than 4 bn years old, and its Mantle is at 1000 deg C, then shouldn't we expect the earth -crust (40 km thin) to become equally hot due to conduction of heat (after such a long period of time)? Or is the material of the crust such a bad conductor of heat? If so, then really how bad conductor is it?

2007-11-16 05:24:30 · 4 answers · asked by sbijapure 2 in Earth Sciences & Geology

A. Wild cat?

B. "Huggy" bear?

C. Bunny?

D. Fox?

I choose A. Wild cat ;)

2007-11-16 05:23:46 · 7 answers · asked by Anonymous in Zoology

what does the square root of 200x / square root of 10 x^-1 =


please show work, thank you

2007-11-16 05:22:02 · 4 answers · asked by Anonymous in Mathematics

f(x)-1/3(x-2)^2-3

a) Explain how the parabola that is the graph of f obtained from graph of y=x^2 using appropriate translations and scaling

b) Using (a) what are the coords of the vertex

c) find the x-intercepts and y-intercept

d) What is the image set of f (interval notation)

Thanks for any help

2007-11-16 05:06:13 · 2 answers · asked by Ms X 1 in Mathematics

Compare the light-gathering powers of one of the Keck telescopes (10 m in diameter) and a 6 m telescope.
Keck/6 m =

2007-11-16 05:05:57 · 5 answers · asked by Mike D 2 in Astronomy & Space

Which of the following names (for poison ivy) is currently acceptable and why?

1) Rhus radicans
OR
2)Toxicodendron radicans

I need help with obtaining any historical factors and nomenclature changes that may have changed the phylogeny.

Thanks in advance!

2007-11-16 05:04:21 · 4 answers · asked by krogerpharmtech 2 in Botany

and 3 divide equivalent fractions for 24/60

2007-11-16 05:02:37 · 3 answers · asked by queenie! 1 in Mathematics

Figure P9.81 shows a water tank with a valve at the bottom. If this valve is opened, what is the maximum height attained by the water stream coming out of the right side of the tank? Assume that h = 9.0 m, L = 1.50 m, and = 35° and that the cross-sectional area at A is very large compared with that at B.
m (above the level where the water emerges)

http://smg.photobucket.com/albums/v296/operaprincess315/?action=view¤t=p9_81.gif

2007-11-16 05:00:22 · 2 answers · asked by Butterfly <3 2 in Physics

2007-11-16 04:58:24 · 2 answers · asked by Anonymous in Mathematics

2007-11-16 04:58:05 · 10 answers · asked by Slayer 1 in Earth Sciences & Geology