Science & Mathematics - 8 October 2007

express aswer in standard form of a circle

2007-10-08 20:51:27 · 4 answers · asked by Anonymous in Mathematics

hey
i have a test tomorrow on problems about acceleration and velociy and stuff and i have no clue how to do this stuff :( can someone please help me and explain?

a plan starting from rest at one end of a runway, undergoes a constant accerleation of 1.6 m/s2 for a distance of 1600m before takeoff. what is its speed upon takeoff? what is the time required for takeoff?

i tried plugging this in..
do i use the acceleration formula?
but switch it around so the time variable is alone?
omgosh please help and explain

2007-10-08 20:46:58 · 9 answers · asked by cocomademoiselle 5 in Physics

A rectangular piece of 4m x 5m is being rolled to fit and form the cylindrical surface of a metal container.Assuming thickness and base of the cylynder are accounted for.What is the volume of this container(take II to be 3.14)

2007-10-08 20:41:56 · 4 answers · asked by Huyoon m 1 in Mathematics

I have a HPS lamp which emit much (about 80%) of its light with a wavelength, between 550nm and 620nm, I want to know if one can use a colour filter to change colour of the light emitted, blue (or a value between 420nm and 500nm) without loosing to much of the intensity of the light. If a filter is just filtering the light then I suppose most of the light, above the 500nm wavelength will be lost...true? I do not know how this works but if it is just changing the colour it would be great to change the light blue with almost the same lumens.

2007-10-08 20:40:27 · 2 answers · asked by matroosje 2 in Physics

2007-10-08 20:35:50 · 1 answers · asked by lilangelsarah23 1 in Medicine

pre calc prob

2007-10-08 20:34:50 · 2 answers · asked by Anonymous in Mathematics

I haven't seen it, only heard it when it wakes us up at night. I live in southeast michigan, near lake Erie. The call it makes reminds me of a combination of a ghost and a horse whinny. Quite loud. It does wake us up. It does also make a trilling call. It's NOT an owl of any kind. Any ideas? or does anyone know where i might look for more information? Thanks!

2007-10-08 20:33:57 · 6 answers · asked by Starr 2 in Zoology

2007-10-08 20:24:05 · 2 answers · asked by Anonymous in Mathematics

When differentiating y=tanx/x

The steps go as follows:?
y'=x * sec^2x - tanx * 1 / x^2

But is it possible to cancel out an "x" from the top and bottom & leave it as:

y'= sec^2x - tanx / x ?????

2007-10-08 20:20:43 · 3 answers · asked by ill_N1n0 2 in Mathematics

2007-10-08 20:19:28 · 1 answers · asked by Anonymous in Mathematics

What keeps the sun going and how does it survive without oxygen??

2007-10-08 20:12:17 · 6 answers · asked by Sam D 2 in Astronomy & Space

2007-10-08 20:11:48 · 3 answers · asked by thecookfamily00 1 in Engineering

2007-10-08 20:07:59 · 4 answers · asked by Doodlebug 4 in Earth Sciences & Geology

Is there any other way other than the barrel method? I'm still unclear on how that is done... Can anyone tell me how to make charcoal accurately? Is there a way to make it on an electrical STOVE? Any feedback would be great!

2007-10-08 20:01:57 · 2 answers · asked by Anonymous in Chemistry

2007-10-08 19:59:33 · 5 answers · asked by chicken 1 in Biology

2007-10-08 19:58:16 · 3 answers · asked by Pratap 3 in Biology

A) 7
B) 5
C)8
D)6

2007-10-08 19:56:54 · 8 answers · asked by thecookfamily00 1 in Mathematics

2007-10-08 19:47:52 · 3 answers · asked by Anonymous in Mathematics

2007-10-08 19:45:51 · 7 answers · asked by Anonymous in Medicine

I need to get a granite headstone for a family member. I am particularly interested in the black ones.
My concern is how much the color will fade over time. Is it better to get a lighter color so it attracts less sunlight?

2007-10-08 19:34:53 · 3 answers · asked by Cat 4 in Earth Sciences & Geology

It is for a science project.

2007-10-08 19:17:32 · 5 answers · asked by Sassyshiba 3 in Weather

2007-10-08 19:12:46 · 7 answers · asked by pari_paree 2 in Astronomy & Space

what proof is there that other galaxies exist beyond other galaxies? how do we come to that conclusion?

2007-10-08 19:07:45 · 9 answers · asked by Anonymous in Astronomy & Space

2007-10-08 19:04:08 · 17 answers · asked by hairchick046 1 in Parapsychology

2007-10-08 18:56:26 · 1 answers · asked by Rajchem 2 in Chemistry

Whats common oxidation numbers & Atomic Radius for Rubidium? and what are the units?

2007-10-08 18:43:00 · 1 answers · asked by WHAT 1 in Chemistry

1 or 2?

2007-10-08 18:42:32 · 14 answers · asked by Anonymous in Zoology

what if two numbers repeat equally??

then it means there is no mode??

ie - 11877

2007-10-08 18:39:49 · 6 answers · asked by azen 1 in Mathematics

Take pegasus for example. Visible starting near the end of summer and continuing through autumn if you live in the Northern Hemisphere and if you are below the Equator, Pegasus is visible in late winter and through spring.

2007-10-08 18:37:49 · 4 answers · asked by Rachmanioff 1 in Astronomy & Space

2007-10-08 18:35:52 · 5 answers · asked by darkforce1992 1 in Engineering