English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

Science & Mathematics - 13 December 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. The total volume of the solid is 12 cubic centimeters. Find the radius of the cylinder that produces the minimum surface area.

2007-12-13 17:52:16 · 2 answers · asked by Anonymous in Mathematics

Any one read Brad Steiger's book: "Shadow World: True Encounters with Beings from the Darkside"? I want to know what the last chaper "Preparing for Unexpected Visitors from Shadow World" is about. If anyone could please tell me what that chaper is about, I would greatly appreciate it.

2007-12-13 17:48:42 · 3 answers · asked by Anonymous in Parapsychology

Find all relative extrema and points of inflection for

f(x) = x - sinx

over the interval
0

2007-12-13 17:39:21 · 2 answers · asked by Anonymous in Mathematics

serous answers please.

2007-12-13 17:33:04 · 5 answers · asked by melaugchariot7 1 in Astronomy & Space

What part of the plant is coloured red?

2007-12-13 17:31:25 · 9 answers · asked by darren t 1 in Botany

A plane is sitting on a giant treadmill. At time zero, the plane and the treadmill are both stationary. As the plane tries to take off, the treadmill rotates backwards at the exact same speed that the plane is moving.

Does the plane take off?

2007-12-13 17:18:25 · 5 answers · asked by itsmedannyp 2 in Physics

I live in California. Thanks

2007-12-13 17:15:18 · 6 answers · asked by mofo 2 in Astronomy & Space

2007-12-13 17:15:00 · 11 answers · asked by Ali 4 in Astronomy & Space

There appears to be a set of stars between the handle of the big dipper and the star to which I am referring. I'm sure that it varies given the surrounding light. The yellow star to which I am referring is a little to the east and south of the direct center sky at midnight...the big dipper is directly south.

2007-12-13 17:09:07 · 5 answers · asked by jb 2 in Astronomy & Space

what's all the big commotion about anyways

2007-12-13 17:01:27 · 29 answers · asked by Ricky A 1 in Astronomy & Space

1

I understand the harm in releasing garbage into space, but what would be the harm of incinetaring it and releasing the gas into space?

2007-12-13 16:57:24 · 5 answers · asked by patrickandamie 3 in Astronomy & Space

How many years would it take to travel 400 light years if i was moving at 100 miles per hour?

2007-12-13 16:56:32 · 3 answers · asked by thcme2_61611 1 in Astronomy & Space

I am no scientist but I have 2 ideas and id like all of your humble opinions. Why cant we filter out car emmisions 95% or so with a filter and reroute the the airflow to the engine with an auxillary breather. Also I know we have electric cars, and we also have air compression powered vehicles. Both of these work what if we combined the 2 for more power and add and additional 3 gallon diesel tank for even more support and less emissions. 3 gallons vs 15 gallons in a 2 week period is a lot better and less polluting. Please give me some ideas why cant we filter out the current emissions and have additional breathing support for the vehicle. Is my other idea about new car technology plausable.

Also no cynical answers I know its all about oil and money but really are these ideas possible thanks.

2007-12-13 16:53:21 · 4 answers · asked by Anonymous in Physics

It says during the Peak Hours..What time is that? I want to see it..!

Here the Yahoo Link http://news.yahoo.com/s/space/20071207/sc_space/bestmeteorshowerof2007peaksdec13

2007-12-13 16:51:24 · 3 answers · asked by Kimmie 2 in Astronomy & Space

2007-12-13 16:48:54 · 41 answers · asked by Anonymous in Earth Sciences & Geology

1.explain why each of the follwing pairs is not lieky to form an ionic bond.
a. chlorine and bromine
b. potassium and helium
c. sodium and lithium

2007-12-13 16:48:36 · 6 answers · asked by LumpiaEATER ! 2 in Chemistry

I need help for an upcoming test, and can't seem to find help anywhere. Help is appreciated. thank you in advance

2007-12-13 16:47:06 · 4 answers · asked by Docta Procta 2 in Mathematics

I want to know, from Australia back to Australia, what is the earts circumfrerence?????

2007-12-13 16:46:21 · 1 answers · asked by jessica s 2 in Geography

...since they can become any kind of tissue and can replicate themselves in the laboratory."

2007-12-13 16:44:30 · 2 answers · asked by Anonymous in Biology

2007-12-13 16:42:30 · 5 answers · asked by Scythian1950 7 in Mathematics

Ok the porlbmei s

1. 2x^2-6x+5=0
2. 2x^2-6x-5=0

It says we have to determine a nature of the roots..

i really dont get it how do you identify a nature of roots,
and also how many natures of roots are there?

2007-12-13 16:41:25 · 5 answers · asked by jin l 2 in Mathematics

If families share similar properties, how is it possible that metals, nonmetals, and metalloids are in the same family? thanks : )

2007-12-13 16:38:16 · 2 answers · asked by Anonymous in Chemistry

2007-12-13 16:36:32 · 3 answers · asked by DO YOU LOVE ME♥*´`*•.¸★。 3 in Other - Science

You hear them on TV all the time, there's a new system coming from Pacific or Atlantic. My question is do all the systems form in the ocean, whether it's storm front or low/high pressure. Do we ever get localized systems that are born, lets say within 24 hours, on localized region away from any water.

2007-12-13 16:27:36 · 3 answers · asked by Adel 2 in Weather

fedest.com, questions and answers