Science & Mathematics - 14 October 2007

the directions say simplify each expression, how would i simplify
x^2-16x+63
------------------
8x-56

2007-10-14 16:21:39 · 9 answers · asked by Anonymous in Mathematics

how can you find the wavelength of a longitudinal wave

2007-10-14 16:20:38 · 3 answers · asked by lzp93627 1 in Physics

Part one Heat of Solution:
If 4.436 g of NaOH was added to 150.0 mL of water
and we assume the density of water to be 1.000 g/mL
then what is the total mass? (Watch your Sig. Figs.)

If in part one, 4.436 g of NaOH was weighed out. How many moles of NaOH is this ?

Given that the temperature change observed was 11.5 C
when 4.436 g of NaOH were added to 150.0 mL of water.
What is the heat energy in kJ that is produced. (Don't
forget the specific heat of this SOLUTION is 4.06 j/ g C.)

Lets say that the heat produced when 4.436 g of NaOH was added to a water solution was 6.123 kJ. What is the calculated heat of solution (hint kJ/mole)?

These are some practice quiz problems Im having trouble with. Thanks.

2007-10-14 16:19:01 · 2 answers · asked by qwerty 2 in Chemistry

Hi everyone,

I'm having trouble with Algebra. Can someone give me a hand with this one?

Solve. x^2 = -10x

2007-10-14 16:15:06 · 9 answers · asked by Jane S 1 in Mathematics

On what side of the membrane are Na + ions released from the pump?

On what side of the membrane are K + ions released from the pump?

I don't understand what they mean by side, and where you look from your eye.

2007-10-14 16:14:23 · 4 answers · asked by Anonymous in Biology

How long would it take to travel to Neptune?

2007-10-14 16:09:51 · 7 answers · asked by Michelle B 1 in Astronomy & Space

Jokers and skeptics...PLEASE ..try to restrain yourselves!!! lol
I do realize you can't pass up a good "jab in the ribs"..but we already know what you're going to say.What the heck..c'mon and get your 2 points.!

2007-10-14 16:08:36 · 14 answers · asked by Deenie 6 in Paranormal Phenomena

a = 5 i − 2 j + 4 k

How would i go about finding a unit vector having the same direction as a and finding a unit vector oppositely directed to a?
Working out would be great.
Thanks

2007-10-14 16:08:04 · 3 answers · asked by Anonymous in Mathematics

It's one of the last problems in my geo exam and I'm stuck on it!! Help please! btw, how on earth is this a geography question? I hate how geo has so much history mixed in...

2007-10-14 16:06:03 · 3 answers · asked by Anonymous in Geography

Hello, I'm considering studying mechanical engineering at the university. However, I am a terrible drawer and am usually clumsy when working with my hands. However, I am very creative and love working as part of a team. Should my lack of drawing skills question my ability to become an engineer? I love working with machines and stuyding mechanics, and I would like to know if drawing skills are really that important.

2007-10-14 16:05:25 · 8 answers · asked by airforcewolf 4 in Engineering

ahhh please help!!!
pre cal prob!

2007-10-14 16:05:05 · 5 answers · asked by icygurl555 1 in Mathematics

Ok i don't know how to do this one and if any one can help me i will appreciated;

rad 75 + rad 48 divided by rad 3

Help guys and girls :)

2007-10-14 16:03:07 · 2 answers · asked by HEy 3 in Mathematics

a 100 L flask contains a mixture of CH4, and argon at 25 C, the mass of argon present is 228 g. and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture.

How would you work this problem?

2007-10-14 16:01:47 · 1 answers · asked by sexxxxxxy4u 2 in Chemistry

(pretend it's possible) what would he see or what would it feel like? describe temp, climate, geography, etc.

2007-10-14 16:01:25 · 4 answers · asked by Anonymous in Astronomy & Space

1. in most classification systems, _____________ is the broadest taxon.

2007-10-14 15:58:04 · 4 answers · asked by Anonymous in Biology

A certain pendulum swings through an arc of one degree in one second. Next, the same pendulum is made to swing through an arc of two degrees. The time required to swing through the two-degree arc is:

a) one-half second
b) one second
c) two seconds

2007-10-14 15:57:24 · 3 answers · asked by ? 6 in Physics

Prove that
∫(1/x) = ln(x)

2007-10-14 15:57:14 · 4 answers · asked by whitesox09 7 in Mathematics

2007-10-14 15:57:00 · 2 answers · asked by D 1 in Other - Science

I think I know the answer but a website says I am wrong...

2007-10-14 15:56:54 · 19 answers · asked by Alawex12 3 in Mathematics

the focus is on physicians and the variety of medical specialties

2007-10-14 15:50:40 · 3 answers · asked by Pini 1 in Medicine

1. the two word term that comprises the scientific name Homo sapien is an example of_____________?

2. Scientific names for made of a(n) _______ and a species?

3. A(n) __________ Guides users to the identifications of an organism.

4. Members of the ______________ Aves are birds.

2007-10-14 15:43:09 · 3 answers · asked by Anonymous in Biology

My mother has these awful pains in her neck, legs, and arms. She also says she feels cold. Can anyone tell what this is???

2007-10-14 15:42:01 · 5 answers · asked by polluxgirl14 2 in Medicine

this is math problem

2007-10-14 15:40:33 · 4 answers · asked by la chula 1 in Mathematics

I heard a few years ago that the Earth will change its direction of spin in the year 2012, but i haven't heard anything new on it, such as the specific date (if there is one) and any changes to the theory.

2007-10-14 15:38:46 · 32 answers · asked by balaklava man 2 in Astronomy & Space

With fresh water fish in a tank....if i took a small amount of fresh water out and replaced it with salt water, would the fish adapt ?

2007-10-14 15:36:17 · 9 answers · asked by mingblack 3 in Zoology

I was doing some metal detecting along the shores of Lake Ontario when I was on vacation. The mental detector went crazy beeping on this rock. I have searched several sources and even asked the guy at the metal detector store. Does anyone know what this rock might be?

2007-10-14 15:33:48 · 17 answers · asked by onlyonemeg 3 in Earth Sciences & Geology

You have to factor. I just can't seem to get the hang of it.

2007-10-14 15:28:07 · 3 answers · asked by Jessica W 1 in Mathematics

8*5+n<56

15>3*n-4

2007-10-14 15:25:44 · 2 answers · asked by Anonymous in Mathematics

2007-10-14 15:22:55 · 3 answers · asked by Terri L 2 in Biology

2007-10-14 15:21:57 · 3 answers · asked by judykharrison 1 in Mathematics