Science & Mathematics - 5 December 2007

2007-12-05 02:54:35 · 6 answers · asked by hey.goodlookin 2 in Mathematics

{(x + 5) / ( 2) = (y + 17) / ( 4)

{(x / 4) = (2y + 8) / (8)

a. (3, -1)
b. (-1, 3)
c. infinite number of solutions
d. no solution

2007-12-05 02:54:07 · 2 answers · asked by . 1 in Mathematics

Write the following expression as a sum and/or difference of the logarithms.

log((sqrt(x+2) / x^2-x))

I know the rules....I just need the answer ASAP...I thought I knew the answer, but it was wrong and I don't know why? Please help me....I promise to give 10 to best answer!

2007-12-05 02:52:31 · 6 answers · asked by ☺♠JonasJay♫♦ 5 in Mathematics

2007-12-05 02:45:12 · 5 answers · asked by ramesh nair 1 in Physics

how can they tell how far down underground were a earthqwake happened?

2007-12-05 02:44:17 · 1 answers · asked by horselovernatty 2 in Earth Sciences & Geology

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is θ = 12.0°, that the cars were separated by distance d = 25.0 m when the driver of car A put the car into a slide (it lacked any automatic anti-brake-lock system), and that the speed of car A at the onset of braking was v0 = 16.0 m/s.

(a) With what speed did car A hit car B if the coefficient of kinetic friction was 0.60 (dry road surface)?
m/s

(b) What was the speed if the coefficient of kinetic friction was 0.10 (road surface covered with wet leaves)?
m/s

2007-12-05 02:40:35 · 2 answers · asked by Anonymous in Physics

i want the balstein library (chemistry)

it has the chemicalformules &reactions of nearly 1.5 million reactans

i want u to get me the place frm which i can get it
torrents will work great
or any other

2007-12-05 02:39:05 · 1 answers · asked by dhandeep l 1 in Chemistry

The figure shows a box of mass m2 = 1.10 kg on a frictionless plane inclined at angle θ = 40°. It is connected by a cord of negligible mass to a box of mass m1 = 4.50 kg on a horizontal frictionless surface. The pulley is frictionless and massless.

(a) If the magnitude of horizontal force is 2.3 N, what is the tension in the connecting cord?
N

(b) What is the largest value the magnitude of may have without the cord becoming slack?
N

2007-12-05 02:39:02 · 1 answers · asked by Anonymous in Physics

a=41.5m, c=34.5m, B=151.5degrees

2007-12-05 02:35:12 · 9 answers · asked by Princess 2 in Mathematics

plz help me solve...polynomial question

2007-12-05 02:34:02 · 7 answers · asked by shellyeph 1 in Mathematics

2007-12-05 02:33:14 · 1 answers · asked by ran n 1 in Geography

i need someone in the hou.gal.area to show this rock to.It apears to have come from space

2007-12-05 02:33:13 · 8 answers · asked by Harold M 1 in Astronomy & Space

What is the better option for the larger object in this situation and why. The collision between the two objects can not be avoided and the collision is a straight on. If an object weighing 9000lbs is traveling at 40mph and approaches an object weighing 2000lbs, should the larger object continue on its trajectory and speed at 40mph and collide with the smaller object or should it slow down to 20mph before the impact?

2007-12-05 02:31:17 · 1 answers · asked by Tickster17 1 in Physics

2007-12-05 02:28:41 · 17 answers · asked by Phil McCracken 5 in Astronomy & Space

2007-12-05 02:25:06 · 5 answers · asked by Anonymous in Physics

2007-12-05 02:20:59 · 10 answers · asked by Anonymous in Chemistry

originally i thought alum was alum ,i didnt know that they were different types

2007-12-05 02:17:20 · 1 answers · asked by xerxes n 2 in Chemistry

im in urgent need of money

2007-12-05 02:12:09 · 4 answers · asked by Pisces 3 in Medicine

I sorta know how to find out but I don't know rather you times it by 2 or 2.2

2007-12-05 02:11:46 · 7 answers · asked by Anonymous in Mathematics

express the sum using summation notation

-1+(2/2)+(-3/4)+(4/8)+...

2007-12-05 02:10:06 · 5 answers · asked by JahAtmosphere 1 in Mathematics

IUPAC. Peoples are use this word in chemistry. I want to know the full form of this word.

2007-12-05 02:09:20 · 5 answers · asked by Anonymous in Chemistry

The specific heat capactiy of silver is 0.24 J/g 'C.

a) Calculate the energy required to raise the temperature of 150.0 g Ag from 273 K to 298 K.

b) Calculate the energy required to raise the temperature of 1.0 mol Ag by 1.0'C (called the molar heat capacity of silver).

2007-12-05 02:08:56 · 5 answers · asked by Caramel 2 in Chemistry

2007-12-05 02:08:36 · 7 answers · asked by Anonymous in Astronomy & Space

"The" Earth, "The" Sun or "The" Moon but you don't say "The" Mars, "The" Jupiter or "The" Venus ??

2007-12-05 02:08:07 · 9 answers · asked by Anonymous in Astronomy & Space

Are there galaxies (apart from our own milky way) that can be seen by the naked eye? if so, name one. if not explain?

2007-12-05 02:08:03 · 7 answers · asked by Anonymous in Astronomy & Space

2007-12-05 02:06:49 · 12 answers · asked by mehul t 1 in Mathematics

The specific heat capactiy of aluminum is 0.900 J/g 'C

a) Calculate the energy needed to raise the temperature of a 8.50 x 10^2 g block of Aluminum from 22.8'C to 94.6'C.

b) Calculate the molar heat capacity of aluminum

2007-12-05 02:04:39 · 1 answers · asked by Caramel 2 in Chemistry

by carrying out experiment

2007-12-05 02:03:48 · 12 answers · asked by fifzy10 1 in Earth Sciences & Geology

I thank the answers but I need biological level answers.
My question is, why does an old man need a blood vessel dilator to get erection?
What is the matter with his penis, body, blood, etc?
What is going on with his chemistry or biology of his body?
Why the Sildenafil is good for that?
I hope that somebody knows it.

2007-12-05 02:03:41 · 4 answers · asked by Pedro D 1 in Medicine

2007-12-05 02:03:09 · 3 answers · asked by Anonymous in Biology