Science & Mathematics - 30 October 2007

2007-10-30 16:13:47 · 26 answers · asked by Anonymous in Biology

Finding the derivative...do you just take the deriv..1/1/x^2 + 1 (2x)..i don't know..please help if you know...thanks a lot!

2007-10-30 16:13:27 · 4 answers · asked by KERRY K 1 in Mathematics

iam in the state of virginia

2007-10-30 16:10:19 · 4 answers · asked by michaeljustussvcc 1 in Engineering

Solution A is a solution of silver nitrate, and solution B is a solution of potassium chromate. The masses of the solutes in each of the solutions are the same. When the solutions are added together, a blood-red precipitate forms. After the reaction has gone to completion, you dry the solid and find that it has a mass of 331.8

(a) Calculate the concentration of the potassium ions in the original potassium chromate solution in M

(b) Calculate the concentration of the chromate ions in the final solution in M

2007-10-30 16:10:08 · 2 answers · asked by Troy p 1 in Chemistry

ok ~ do u guys know how to solve this:

40=100( 0.88) ^ n

solve "n" ~ = . =

ummm-

i need the Hand doing way ( do u guys mind explain?)



also show me the calculator way if u can ^___^

THX U~

2007-10-30 16:09:56 · 2 answers · asked by toocutedoggy 1 in Mathematics

Catching a wave, a 64 kg surfer starts with a speed of 1.3 m/s, drops through a height of 1.75 m, and ends with a speed of 8.2 m/s. How much nonconservative work was done on the surfer?

2007-10-30 16:09:24 · 1 answers · asked by =P 6 in Physics

2007-10-30 16:07:53 · 1 answers · asked by Kay-Kay Maddry Catz S 1 in Biology

I did when I was around 12. Me and my grandma saw one in the sky. It was the size of the moon but very close and rotating.

2007-10-30 16:07:25 · 8 answers · asked by fastfreedombailbonds 4 in Astronomy & Space

2007-10-30 16:06:22 · 3 answers · asked by Kay-Kay Maddry Catz S 1 in Biology

Rewrite each equation in the form y= mx + b. Then write an equation for a line parallel to the first and passing through the given point.


1) 6y = 3x - 12; (2,-4)
2) 1/2y = 3x; (-2,-9)
3) 5y = 4x + 5; (-5,-4)
4) 10y = -20x -20; (1,-3)
5) 3x = 3y - 12; (-5,-11)

2007-10-30 16:05:05 · 6 answers · asked by erikjjjacob 1 in Mathematics

2007-10-30 16:04:36 · 11 answers · asked by Cordy 2 in Biology

I would love to hear some educated, non-religious viewpoints on entity or demonic possessions.

Is it possible for humans to be possessed? Is so then how would it happen? If not, then why is it not possible?

Please examine this question from a perspective that entities and or demons do exist.

IF you don't believe in the possibility of their existence, then please do not respond. Also, as this is the paranormal forum, I am not interested in religious based answers - otherwise I would have posted it in the religion forum.

This question is to inspire thinking and voice different educated perspectives.

I'm looking for respectful answers that will challenge our minds. I appreciate any answers that have some scientific or research basis to them.

I look forward to reading your answers.
:)

2007-10-30 16:03:27 · 7 answers · asked by Reiki Chick 6 in Paranormal Phenomena

2007-10-30 16:02:12 · 10 answers · asked by Anonymous in Weather

while you are driving along at 50 km/hr your attention wanders for 1/2 sec, how far do you travel "blind" in that half second?

2007-10-30 16:02:04 · 5 answers · asked by hepaintsmeeblue 1 in Physics

sqrt(x) + sqrt(2x-1) - 2 = 0.

plz show me how to solve this

2007-10-30 15:57:15 · 8 answers · asked by yassem1ne 2 in Mathematics

Writes the equation of the line parallel to the given line and passing through the given point.

1) y= x + 4; (2,5)
2) y= 3x - 1; (1,4)
3) y= 2x - 2; (2,8)
4) y= x - 7; (4,6)
5) y= 3x - 3; (-2,-5)

2007-10-30 15:56:44 · 5 answers · asked by erikjjjacob 1 in Mathematics

the biggest thing in science is experimenting, and yet there is no specific section on experiments w/in the science section.

Anyone else find this unusual?

2007-10-30 15:55:18 · 2 answers · asked by keyahnoo 2 in Other - Science

A 75kg bobsled is pushed along a horizontal surface by 2 athletes. after the bobsled is pushed a distance of 4.5 m starting from rest, its speed is 6.0 m/s. find the magnitude of the net force on the bobsled. is the answer 300N?

*i think this problem has something to do with the work kinetic energy thm.

2007-10-30 15:54:26 · 5 answers · asked by Haya 1 in Physics

PLEASE HELP! Thanks.

2007-10-30 15:52:49 · 2 answers · asked by Kay-Kay Maddry Catz S 1 in Biology

2007-10-30 15:51:39 · 8 answers · asked by Anonymous in Engineering

e^x = 4 - 2x
*note: the stuff inside [brackets] indicates "sub" for example: x[n+1] --> x(sub)n+1

I got as far as x[n+1] = x[n] - ( ln(4-2x) / ((-2 / (4-2x[n])) - 1 )

I'm not even sure if that's correct either. I've been using x[1] = 1 as the starting point and after calculating up to around x[6] or so, I always end up with 1.499999 or 1.500000, which are both wrong answers.

Can anyone tell me where I'm messing up?

2007-10-30 15:49:46 · 5 answers · asked by enhancedbycolor 2 in Mathematics

Final examination grades in an introductory stat course is normally distributed with a mean of 73 and a standard deviation of 8


If the professor grades on a curve (gives A's to the top 10% of the class regardless of the score) are you better off with a grade of 81 on this exam or a grade of 68 on a different exam where the mean is 62 and the standard deviation is 3? Answer statistically and explain

2007-10-30 15:49:36 · 2 answers · asked by Anonymous in Mathematics

I'm not sure how to do this problem:

Determine the binomial factors of x^3+4x^2-x-4

please show steps on how to solve it...

2007-10-30 15:49:26 · 1 answers · asked by Anonymous in Mathematics

please explain

2007-10-30 15:45:18 · 1 answers · asked by Anonymous in Chemistry

The pressure of the air in the Earth's atmosphere decreases exponentially with altitude above the surface of the earth. The pressure at the Earth's surface (sea level) is about 14.7 pounds per square inch (psi) and the pressure at 2,000 feet above sea level is approximately 13.5 psi.

Write an equation that expresses pressure in terms of the altitude. (Use information given to find "r" first)

Thanks!!!

2007-10-30 15:41:19 · 1 answers · asked by Blondie4321 2 in Mathematics

They told me something about having to use (b^2-4ac) to answer the problem but i have no clue on what to do, if you happen to know how to solve this problem please do so, with steps on how to do it please...

Find the discriminant, how many solutions does it have, real or imaginary. Then solve the quadratic equation:
4x^2-2x+9=0

2007-10-30 15:38:54 · 2 answers · asked by Anonymous in Mathematics

I got in on the end of it. Seemed like they were excited about whatever they found.

2007-10-30 15:36:43 · 7 answers · asked by Deenie 6 in Paranormal Phenomena

was sputnik 2 a satellite or a space ship or what? I am doing a report on satellites and space stations, would it be irellavent to include sputnik 2 on my posterboard?

2007-10-30 15:30:08 · 10 answers · asked by Anonymous in Astronomy & Space

Benzene and toluene form an ideal solution. Consider a solution of benzene and toluene prepared at 25°C. Assuming the mole fractions of benzene and toluene in the vapor phase are equal, calculate the composition of the solution. At 25°C the vapor pressures of benzene and toluene are 95 and 28 torr, respectively.

x^L benzene ?

x^L toluene?

2007-10-30 15:28:10 · 1 answers · asked by Jake H 1 in Chemistry

What would happen if all the Protists died out?

2007-10-30 15:28:07 · 3 answers · asked by Anonymous in Other - Science