Science & Mathematics - 15 February 2007

It's such an odd and creepy name....I have always wondered.

2007-02-15 16:23:54 · 4 answers · asked by ? 6 in Zoology

Please help me please. I need a clear step-by-step explanation on a few problems that I'm stuck on. Thank you!!!!

1) Solve for x in terms of a and b: (a^2 – 2a^2b^2 + b^4)^(x-1) = (a - b)^(2x)(a + b)^(-2)


2) Given that 5^ [log (base 5)][(log (base2) log(base3) log (base4) x = log (base squareoot5 – 2) (9 – 4squareroot5) and 1/i(as in imaginary i)log^[log(base e)log(base2)y] = pi. Evaluate log(base 2) (x/y). (HINT: e^(pi (imaginary i)) = -1


3) Solve for x: (5 squareroot2 x) ^ [(log (base4)) (5 squareroot2 x)] = 625 x ^ 4


4) Solve for x: log(base8)(1 - x) + (10log(base32)x) / (log(base8) 512) – log (base2)e^[ln(1/x+1)] / 243^(1/3) = cuberoot(64/27)

2007-02-15 16:22:47 · 2 answers · asked by ange h 1 in Mathematics

IE it's going away.

2007-02-15 16:22:06 · 12 answers · asked by hronikey2005 2 in Astronomy & Space

A hot air balloon is rising upward with a constant speed of 15 m/s. When the balloon is 2 m above the ground, the balloonist accidentally drops a compass over the side.

a.) How much time elapses before it hits the ground?
1.62882 s ?

b.) What is its speed just before it hits the ground?
9.8 m/s ??

c.) How high above the ground is the balloon when the compass hits the ground? 2 m??

2007-02-15 16:21:27 · 4 answers · asked by soccerjock 2 in Physics

2007-02-15 16:20:46 · 2 answers · asked by Cool coll 3 in Geography

In demonstrating diffraction with light through an aperture, why are there black spaces in between the light/line of light?

2007-02-15 16:18:51 · 2 answers · asked by Angelfire 2 in Physics

2007-02-15 16:18:14 · 6 answers · asked by matt 1 in Physics

I think that groundhog was wrong about his weather forecast. LoL!

2007-02-15 16:17:44 · 14 answers · asked by lady_d_the_diva 3 in Weather

2007-02-15 16:17:39 · 8 answers · asked by purlacg 1 in Zoology

If only an external force can change the momentum of the center of mass of an object, how can the internal force of the engine acclerate fa car?

2007-02-15 16:17:17 · 2 answers · asked by Space Cadet 3 in Physics

What keeps them from drifting off into outer-space?

It should be getting colder as it goes up, & the balloon is farther away from earth. The further an object is from earth, the less the gravitational pull is, right? So it should be easier & easier to break free of the pull of gravity as the balloons go up.

What keeps them from going up forever, or until their hot air supply runs out?

2007-02-15 16:17:14 · 4 answers · asked by Anonymous in Physics

It is the last problem on my math homework and I need help on it please... I'll repeat it again look below...

3a + 2(2a + 5) = 3
I need to solve for a please help.

2007-02-15 16:15:46 · 15 answers · asked by Mike T 2 in Mathematics

At the point of fission, a nucleus with 96 protons is divided into two smaller spheres, each with 48 protons and a radius of 6.4*10^-15 m. What is the repulsive force pushing these two spheres apart?

2007-02-15 16:14:26 · 1 answers · asked by Fanjame 1 in Physics

The number of hurricanes during a given year is known to have a mean value of 6.
(a) Calculate the probability that there will be exactly 5 hurricanes during the next year.
(b) What is the probability there will be a total of 5 in a two year period?

2007-02-15 16:13:35 · 4 answers · asked by Adam B 1 in Mathematics

I need to use partial derivatives( in the theorem, normal derivative(d/dx) cannot be used. In maclaurin's theorem a=0, I'm getting zero everywhere in the formula. I know i'm doing something wrong, but can't figure out what it is, Please help!!!

2007-02-15 16:11:46 · 2 answers · asked by Anonymous in Mathematics

I desperately need help with this problem...

Four charges are placed on the x axis as follows:
-7 micro coulombs at -5cm
8 micro coulombs at the origin
-4 micro coulombs at 4cm
-8 micro coulombs at 5cm.

Applying Coulombs law, what is the magnitude and direction of thenet electrostatic force acting on the charge at the origin???

Any help would help....or any tip on how to solve it.

PS. I know Coulombs law is: F= k* Q1*Q2 / distance^2

2007-02-15 16:08:52 · 4 answers · asked by Marisol 2 in Physics

I did a lab on solubility of substances and telling whether they have ionic, polar, or non polar bonds.
Here's one of the questions i can't figure out:
Use the structural differences between ionic and covalent bonds to thoroughly explain the solubility results that you observed.

how does the structure affect the solubility?!?!?

2007-02-15 16:08:23 · 4 answers · asked by babyrooster 2 in Chemistry

2007-02-15 16:07:28 · 7 answers · asked by Anonymous in Weather

By what factor does [H+] change for each pH change?
(a) 5.10 units
(b) 0.48 units

UNITS
inverse log does not seem to work

2007-02-15 16:06:43 · 1 answers · asked by vntraderus88 1 in Chemistry

Two small spheres, each of mass 3.00 g, are suspended by light strings 10.0 cm in length (Fig. P23.62). A uniform electric field is applied in the x direction. The spheres have charges equal to -3.00 10-8 C and +3.00 10-8 C. Determine the electric field that enables the spheres to be in equilibrium at an angle of = 12.0°.

2007-02-15 16:05:34 · 2 answers · asked by Anonymous in Physics

Hello everyone,

I first broached the topic of chronic pain, specifically my chronic pain a few months back while I was in insufferable pain. Well... much has remained the same, I am still in pain and suffering on a day-to-day basis.

There is one medication that I KNOW will absolutely absolve me of all pain... however, will this just be a cover-up? First of all, the medication is paxil, which can treat certain forms of polyneuropathy, which seems to be affecting me. Paxil, will work over the course of a few weeks, ending with the complete cessation of pain -- but is it the right solution?

Would you take an SSRI to solve your chronic pain (hypothetical if you're not suffering at the moment)? Many people take SSRIs for depression alone, not for chronic pain...

What do you think?

Av

2007-02-15 16:02:02 · 4 answers · asked by Avraham 2 in Medicine

2007-02-15 16:00:21 · 2 answers · asked by «Juke» 1 in Earth Sciences & Geology

Four Olympic skaters are attempting to win a medal. The skaters success rates for skaters A, B, C and D are: 72%, 88%, 54% and 83% respectively. Find the probability that skater A and B are successful, but C and D are not. Round to two decimal places.

2007-02-15 15:57:17 · 3 answers · asked by daoudi2287 1 in Mathematics

The 3x-1 is over 4, and that fraction is in absolute value bars.

2007-02-15 15:55:59 · 4 answers · asked by Bethany O 1 in Mathematics

Twenty of the houses on a street receive cable t.v. and seven do not. A researcher studying the amount of time that people watch t.v. intends to visit five of the houses that receive cable t.v and two that do not. How many such selections of houses are there?

2007-02-15 15:55:30 · 2 answers · asked by daoudi2287 1 in Mathematics

taking into consideration the rotation n revolution in mind, can someone explain , why it takes more time to travel to a same place using one of the direction. Can someone please send the explanation , if links are available that would be more helpful.

2007-02-15 15:54:00 · 7 answers · asked by Anonymous in Physics

For what value of h do the rectangle and the triangle have the same area?

2007-02-15 15:52:03 · 3 answers · asked by michielev 2 in Mathematics

2007-02-15 15:50:33 · 4 answers · asked by michielev 2 in Mathematics

i'm making a model for Cerium and it's due tomarrow! how many
shells does cerium have?and how many electron on each shell?(total of 58)

2007-02-15 15:50:28 · 2 answers · asked by Nikki 2 in Chemistry

(x+3) (2x-5)



(x^2+x-1) (x+1)



(2b-1) (b^2-3b+4)

2007-02-15 15:50:14 · 8 answers · asked by Anonymous in Mathematics