Science & Mathematics - 23 November 2007

what's the exact size pls?

2007-11-23 21:44:58 · 3 answers · asked by Rhomeo H 1 in Mathematics

I'm looking for a place to discuss things with people, not just an informational website (although if you know a good one of those, put it up too :)

2007-11-23 21:44:06 · 1 answers · asked by Anonymous in Mathematics

what makes up a cloud?

2007-11-23 21:31:35 · 8 answers · asked by minx7♪♫ 3 in Weather

2007-11-23 21:13:42 · 9 answers · asked by Anonymous in Geography

just checking ^_^

2007-11-23 21:09:23 · 14 answers · asked by mana 1 in Physics

The topic of cold fusion has created a lot of controversy and hype since it was announced some some 15 years ago.

Many people have also claimed to have created fusion using the cold fusion method.

My question is this. In fusion, 2 deuterium atoms will fused to create helium. If the people who claimed they actually created fusion, they must have also detected a lot of helium being generated.

Did those people who claimed to have created fusion actually created helium in the process? The detection of helium would be a definite proof fusion has occurred.

2007-11-23 20:43:46 · 4 answers · asked by TopDog 2 in Physics

i argued my teacher in this,
i think that a plane must need to have x,y,z components.
so there cannot exist 2-d plane i think.

2007-11-23 20:33:41 · 6 answers · asked by Anonymous in Physics

2007-11-23 20:30:29 · 2 answers · asked by reza_hemmatdj 1 in Engineering

the information gathered by space-shuttle missions does not justify the high expenditures of the program.

is this fact..how can you verify?
is this opinion...invalid or valid?why?

2007-11-23 20:28:17 · 3 answers · asked by miharu_tsubaki09 1 in Astronomy & Space

2007-11-23 20:14:29 · 12 answers · asked by Sidney Shane D 1 in Mathematics

2007-11-23 20:12:59 · 11 answers · asked by Sidney Shane D 1 in Mathematics

Why does cold weather front travel faster than warm weather front do? I want to know the reason with using the fact that cold weather front has steeper slope than warm weather front do.

2007-11-23 20:11:41 · 2 answers · asked by Heyyo 1 in Weather

2007-11-23 20:10:03 · 7 answers · asked by Sidney Shane D 1 in Mathematics

2007-11-23 20:08:02 · 10 answers · asked by Sidney Shane D 1 in Mathematics

1. Annual sales of sparkling water in the U.S. in the period 1993-2003 could be approximated by
s(t)= -1.3t^2+4t+160 million gallons

(3
where t is the time (in days) since the egg was laid (an egg will typically hatch at around t=28). Use the model to estimate the following (give the units of measurement for each answer and round all answers to two significant digits):
a. The daily oxygen consumption 20 days after the egg was laid
b. The rate at which the oxygen consumption is changing 20 days after the egg was laid
c. The rate at which the oxygen consumption is accelerating 20 days after the egg was laid.

2007-11-23 20:07:07 · 3 answers · asked by Moss212 2 in Mathematics

What is the smallest possible area of an isosceles triangle that is circumscribed about a circle of radius r? (The circle is inside the triangle). No numbers are given.

2007-11-23 20:06:42 · 6 answers · asked by Anonymous in Mathematics

(this is bmi of female caucasian vs. korean)
caucasian =21.33
korean= 19.7

2007-11-23 20:06:39 · 2 answers · asked by Becca H 1 in Mathematics

Its for my paper, i need to know how it works, step by step. Thank you.

2007-11-23 19:58:55 · 1 answers · asked by Victor 2 in Chemistry

just a question folks, will not go anyfurther

2007-11-23 19:57:13 · 10 answers · asked by Anonymous in Other - Alternative

im working at this lab which involves comparing mumentom of a system before and after an inelastic collision...the trial that the blocks were moving with slower speeds , has a greater percent difference in momentum...i was just wondering if there is any sourse of error in there or is it just normal....the percent difference is doubled in this trial...

2007-11-23 19:56:30 · 3 answers · asked by Ali 4 in Physics

"A beaker of water and a brass cylinder are placed side by side on the pan of a balance and weighed (the cylinder is next to the beaker, not in it). The brass cylinder is then placed in the water and it rests on the bottom of the beaker. Does the balance read different in this case? Explain your answer, and show that it is agreement with Newton's 3rd law of motion (equal and opposite forces)."

Thanks for any help!

2007-11-23 19:51:35 · 3 answers · asked by Metallus 1 in Physics

We know from basic differential calculus that:
lim_{h → 0} [ f(x + h) - f(x) ] / h

But I have also seen the variations:
lim_{h → 0} [ f(x) - f(x - h) ] / h
lim_{h → 0} [ f(x + h) - f(x - h) ] / 2h

Do these variations hold any practicality? Why might one ever prefer one method over the other?

If I am ever forced to use this limit evaluation to determine a derivative, I am sure the first, primary one would suffice.

2007-11-23 19:42:53 · 1 answers · asked by Anonymous in Mathematics

http://paranormal.about.com/cs/timetravel/a/aa052603_2.htm

2007-11-23 19:32:55 · 23 answers · asked by Life goes on... 6 in Paranormal Phenomena

2007-11-23 19:32:21 · 8 answers · asked by puja k 1 in Astronomy & Space

13.The major difference between a calculator and a computer, when performing calculations, is that a
A. Calculator is faster but needs more human assistance.
B. Calculator is slower and needs more human assistance.
C. Computer is faster but needs more human assistance.
D. Computer is slower but needs more human assistance.
C--Is not correct.

2007-11-23 19:24:54 · 8 answers · asked by Anonymous in Mathematics

2007-11-23 19:22:22 · 6 answers · asked by macon 1 in Physics

verifying trigonometric identities

2007-11-23 19:21:50 · 6 answers · asked by tobi 1 in Mathematics

2007-11-23 19:14:45 · 3 answers · asked by tobi 1 in Mathematics

For example, why isnt the unit of electric charge the same charge found in 1 electron/proton? Or speed/distance/time based on the speed of light, and some fundamental measure of distance/time?

It seems like this would help in finding relationships between things, but maybe thats just me.

Don't tell me that "the size of these units isn't convenient". This is why we use prefixes. (kilometer, kilogram, centimeter, etc.)

2007-11-23 19:09:15 · 4 answers · asked by Anonymous in Physics

Solve by completing the square

x^2-14x+45=0

2007-11-23 19:02:00 · 8 answers · asked by babby_bear30_99 1 in Mathematics