Science & Mathematics - 29 September 2006

i have a project in maths and i wanna do something cool and something new and i need an easy formula which is not famous and one which does not use trigonometry

2006-09-29 03:59:54 · 11 answers · asked by blesson t 1 in Mathematics

1 ⤊

In terms of mass, how much of the universe is made up of atoms?

Let's see what most people think about this.....

2006-09-29 03:52:46 · 6 answers · asked by Shane L 3 in Physics

0 ⤊

Database/Relational Algebra question?

I'm trying to find the following
find every department that has a professor who taught all courses offred by that department.
Using relational algebra and then using SQL.
The schema is as follows:
Student(Id:Integer, Name:String, Address:String, Status:String)
Professor(Id:Integer, Name:String, DeptId:String)
Course(DeptId:String, CrsCode:String, CrsName:String, Descr:String)
Transcript(StudId:Integer, CrsCode:String, Semester:String, Grade:String)
Teaching(ProfId:Integer, CrsCode: String, Semester:String)

Any help would be much appreciated, I'm starting think that it is near impossible to represent this in a one line relational algebra formula.

2006-09-29 03:37:34 · 2 answers · asked by patrickdenney2 2 in Mathematics

68 ⤊

how can genetics explain the observable diffrences in bird beaks.?

2006-09-29 03:36:46 · 5 answers · asked by protegebaby403 1 in Biology

0 ⤊

Under what circumstances will a 6 volts L/A battery exhibit 8 volts at rest.?

at the same time elctrolyte density is higher than can be measured with hydrometer.

2006-09-29 03:35:56 · 2 answers · asked by Carl D 1 in Engineering

0 ⤊

For what values of the variable is the rational expression undefined?

I have 2 problems and no Idea how to work them:

3/(x-5) I guessed 5 and 8/(x+2) and guessed 4 I reduced the 8 and 2

2006-09-29 03:33:10 · 6 answers · asked by Anonymous in Mathematics

1 ⤊

if i study chemistry alone in home,will i be sucessful?

2006-09-29 03:32:42 · 13 answers · asked by sochn9022jkl 1 in Chemistry

5 ⤊

Is there life on Mars?

2006-09-29 03:32:16 · 29 answers · asked by Christ 3 in Astronomy & Space

2 ⤊

anybody have ideas of things in future?

2006-09-29 03:29:57 · 15 answers · asked by Anonymous in Physics

5 ⤊

why does society need the formulae of the equation x=55.5?

if you imagine 5.55=x then why does a have the same value as eb? this came up in my physics test last week,

2006-09-29 03:28:38 · 11 answers · asked by always_coca_cola_uk 1 in Mathematics

3 ⤊

Using TI-83 Plus calculator?

My TI-83 Plus already has a lotta data in it. How do i re-enter the data? How do i delete old data? How do i graph functions? What is the right mode to do so? Please help me!

2006-09-29 03:28:29 · 3 answers · asked by Anonymous in Mathematics

3 ⤊

what is this gigantic mosquito?

I found what appears to be a gigantic mosquito. It is about 4 inches across. I live in Illinois. What in the world IS this?!?! YIKES! Thanks.

2006-09-29 03:25:48 · 4 answers · asked by ams7thgraders 1 in Zoology

2 ⤊

If Pluto isn't a planet anymore does it affect horoscopes?

2006-09-29 03:24:58 · 19 answers · asked by tanguera 1 in Astronomy & Space

2 ⤊

Why wouldn't the light from a 10 billion yr old star have past us long ago?

If the universe is 13bil yrs old and started from a single point

2006-09-29 03:18:56 · 13 answers · asked by Leebo 1 in Astronomy & Space

2 ⤊

A Math Problem?

It is not a school problem :) It goes as:
John earns 15% for 8 days. He can invest money (any amount) so how much will he earn every day if he invests $40.

Thanks!
Karl

2006-09-29 03:14:33 · 9 answers · asked by Anonymous in Mathematics

2 ⤊

Do we see the colours same as each other?

Do two people see the same colours exactly the same?How do we able see colour?

2006-09-29 03:13:55 · 12 answers · asked by joe 4 in Physics

0 ⤊

Simplify the expression if possible?

2X^2 - 4X/X-2

I THINK THIS CANT BE REDUCED ANY MORE.

2006-09-29 03:07:50 · 10 answers · asked by Anonymous in Mathematics

0 ⤊

Is it true that our perception of colour is strongly affected by the colours surrounding it?

Is it normal and common?

2006-09-29 03:02:39 · 9 answers · asked by joe 4 in Physics

0 ⤊

What is the study road to becoming a vet?

2006-09-29 02:59:11 · 4 answers · asked by Charlotte 1 in Zoology

0 ⤊

6 Geometry questions?

11.
The hypotenuse of an isosceles right triangle is 8 inches. Find the length of the legs.

16.
A tent is pitched such that it creates an equilateral triangle. If each of the congruent sides measure 2 meters, what is the height of the tent?

17.
An equilateral triangle has an altitude of 7 cm. Find the length of one side.

26.
What is the perimeter of a square with a diagonal of 3√2?

27.
What is the length of a diagonal of a square with a side of length 8?

28.
What is the length of the diagonal of a square with a 15-decimeter side?

2006-09-29 02:58:53 · 8 answers · asked by qtgyjda89 2 in Mathematics

0 ⤊

How much of each municipality falls inside the Capital Beltway (I-495) around Washington, DC?

Specifically: How many square miles of (each) Virginia, Maryland, and DC are encircled by the Capital Beltway (I-495)? What is the ratio of MD:VA:DC inside the beltway?

2006-09-29 02:56:38 · 3 answers · asked by Flipper 1 in Geography

0 ⤊

what is the statistical probability that two blue eyed parents can have a brown eyed child? (birth child)?

2006-09-29 02:54:59 · 11 answers · asked by Chris M 1 in Biology

1 ⤊

((x+2)/x )+((12)/3x-5)? dont understand but i know the answer is -5 or 2/3, how?

2006-09-29 02:54:16 · 11 answers · asked by mini_dilligaf 1 in Mathematics

1 ⤊

Question about string theory...?

If anyone can help that would be great. I've heard a bit about string theory, but I don't quite understand it (well.. at all.) So it's thought that there are something like 11 dimensions, but we only live and participate in 4 of them (including time)... and then the other 7 are wrapped into tightly wound "strings".. I don't get it!!! If the 4 dimensions that we live in are so interrelated, how can there be 7 dimensions that just don't really apply for our existence? And if they do apply - how do they apply? How can a dimension be a tightly would string at all? What are they there for? Does anything exist in these other dimensions? (If anyone could point me in a direction where I could get an idea on some of these ideas about string theory I would greatly appreciate it... ) I am a bit stuck on these questions and can't stop thinking about them!!

2006-09-29 02:50:54 · 4 answers · asked by River 3 in Physics

0 ⤊

when the water level is higher inside and outside the flask, is the gas pressure in the flask higher than?

when the water level is higher inside and outside the flask, is the gas pressure in the flask higher than or lower than or the same as the atmospheric pressure? how could failure to equalize the water levels inside and outside the flask before clamping the rubber tubing in the stopper assemble affect results?

2006-09-29 02:49:02 · 2 answers · asked by sweetgurl_16 1 in Chemistry