Science & Mathematics - 8 November 2007

Is H2 an insoluble gas?

Are there any other examples of insoluble gases?

2007-11-08 15:09:34 · 5 answers · asked by Anonymous in Chemistry

reflection, refraction, diffraction, interference, and absorption.
wat does compare and contrast mean anyways? how do u contrast?

2007-11-08 15:06:28 · 2 answers · asked by rissa 2 in Chemistry

2007-11-08 15:04:17 · 8 answers · asked by hafiz h 1 in Astronomy & Space

2007-11-08 15:04:14 · 5 answers · asked by sabreen 1 in Chemistry

2007-11-08 15:01:54 · 3 answers · asked by Bodo 1 in Botany

x/2=6

2007-11-08 15:01:01 · 13 answers · asked by carlos n 1 in Mathematics

f(x)= 4x^(-5) let g(x) = x^3/4 perform the indicated operation and state the domain

f(f(x))

2007-11-08 14:58:49 · 4 answers · asked by Riddle 1 in Mathematics

if my total area is 2824.948 and the cost information is $1.50 per squared foot plus a $2000 set up charge,$2.25 per squared foot plus a $1000 job fee and $4 per squared foot no set up fees what do I get? PLEASE HELP ME!!!!!!!!!!!!!!

2007-11-08 14:56:59 · 5 answers · asked by sweetmelissa92 1 in Mathematics

1) Find the Limit as x ->infinity of (1 + (10/x))^4x

I've gotten tot he point where it is a 1 ^ Infinity form and have used the Natural Log properties to get it to Ln y = 4x Ln(1 + (10/x))

I do not know where to go from there

2) Find the Limit as x--> Infinity of (x e^(1/x) - x)

I believe this is an Infinity - Infinity problem but don't know how to get it into a 0/0 or Infinity/Infinity form.

3) Find the Limit as x ---> positive Infinity of Sqrt(2+ (x^2)) / x

(Just incase, Sqrt = Square Root)


Any help or suggestions would be great

Thanks

2007-11-08 14:56:55 · 2 answers · asked by redsox_ws 4 in Mathematics

A 190 N sphere 0.20 m in radius rolls, without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest?

2007-11-08 14:56:08 · 1 answers · asked by Butterfly <3 2 in Physics

2007-11-08 14:51:22 · 12 answers · asked by Kellie-Jo M 1 in Botany

If a question asks how much paint is required to coat the side of an oil-tank with 0.5 cm of paint. Tank has radius of 10 m and height of 3 m. It rests flat on its side.

2007-11-08 14:49:36 · 1 answers · asked by earthshake16 1 in Mathematics

I know you multiply cm by 0.01 to convert to meters but if I was finding the area of something with sides 11 cm and 11 cm and I had to have the area in meters, would I convert the cm to meter first and then multiply or would I multiply and then convert. I'm confused because it gives 2 different answers.

11 cm x 11 cm = 121 cm^2
121 cm^2 x 0.01 = 1.21 m^2

or

11 cm x .01 = .11 m
.11 m x .11 m = 0.0121 m^2

Thank you!

2007-11-08 14:49:03 · 4 answers · asked by me 1 in Mathematics

2007-11-08 14:46:10 · 5 answers · asked by tomleah_06 5 in Astronomy & Space

SOMEWONE HELP (I 6th grader who can't understand her math homework)

2007-11-08 14:43:48 · 9 answers · asked by Hilary_m 1 in Mathematics

If electicity costs 0.05/kwh, how much does it cost to run this appliance?

a 1200 W dishwasher for 1 hour

2007-11-08 14:39:54 · 5 answers · asked by Anonymous in Engineering

I'm doing homework/studying for a test right now and I think the reason I am not getting right answers is the limits I choose for triple (and some double) integration problems.

For example...one problem is: evaluate the triple integral - f(x,y,z)= x+y; T is the region between the surfaces z=2-x^2 and z=x^2 for 0<=y<=3 . The limits I put on it were: y: 3 to 0; x: sqrt(2) to 0 (my reasoning for this is from using the z=2-x^2 equation and evaluating it for z=0...is this valid?); and z: 2-x^2 to x^2 ...If these are right, then I'm making computational errors, but I get it. If these are not right, then I do not get it.

Any light you could shed on either the problem or determining the limits would be very much appreciated. By the way, the right answer to that problem is 12. Thanks.

2007-11-08 14:39:22 · 1 answers · asked by Anonymous in Mathematics

I'm really interested in becoming a scientist.

If you would, could you please answer the following:

Name:
Company:
Job Title:

Describe your job:

What you like most about your job:

What you like least:

Personal and Educational Requirements:

Working Hours (paid and unpaid):

What was Most Helpful in Preparing you for this Job:

How Important are High School classes/grades/attendance etc. when applying for this job:

What Other Jobs can be Done with the Same Background:

How Can I, a High School Student, Prepare for this Career:

2007-11-08 14:37:27 · 2 answers · asked by Mya 2 in Other - Science

What structures in Elodea cells are absent in epitheial cells?
And what structures visible in potato cells are absent in Elodea cells?
If you know any of the answers, please help me out.

2007-11-08 14:37:08 · 2 answers · asked by Anonymous in Biology

How long did it took you and what serect tips to bring in the psychic energy through the odyessy music cd. email batlacks@yahoo.com

2007-11-08 14:36:22 · 8 answers · asked by batlacks 1 in Paranormal Phenomena

Here's the question from the text book for my home work:
An object that weighs 340 N is floating on a lake. What is the buoyant force on it? What is the weight of the displaced water?

Is this even possible to solve, if so, can you send me the equation or something?

2007-11-08 14:33:33 · 3 answers · asked by Anonymous in Physics

4. Two air track carts move toward one another on an air track. Cart 1 has a mass of .45kg and a speed of 1.1 m/s. Cart 2 has a mass of .65kg (a) what speed must cart 2 have if the total momentum of the system is to be zero.(b) since the momentum of the system is also zero, does it follow that the kinetic energy of the system is also zero? (c) verify your answer to pat (b) by calculating the system’s kinetic energy.
6. A 220- g ball falls vertically downward hitting the floor with a speed of 2.5 m/s and rebounding upward with a speed of 2 m/s. (a) find the magnitude of the change in the ball’s momentum (b) find the change in the magnitude of the ball’s momentum (c) which of the two quantities calculated in parts (a0 and (b) is more directly related to net force acting on the ball during the collision with the floor? explain?

2007-11-08 14:28:33 · 1 answers · asked by CA-C 1 in Physics

When I stand around...even for just a few minutes, I start feeling really weak and hot - to the point of sweating - and my legs feel "heavy." If I'm in line somewhere and can't sit down, my heart starts pounding and I feel dizzy. I eventually have to lean on something or squat down because I feel like either my legs will give out or I'm so dizzy that I will pass out. And...I'm only 22 YEARS OLD! Anyone else have this problem? ps: My blood pressure has always been right on target (if that helps).

2007-11-08 14:27:51 · 5 answers · asked by Anonymous in Medicine

Why does electromagnetic radiation in the ultraviolet region represent a larger energy transition than does radiation in the infrared region?

2007-11-08 14:26:39 · 1 answers · asked by Redfalcongt 2 in Physics

which is the next planet on which we can live

2007-11-08 14:26:02 · 6 answers · asked by Anonymous in Astronomy & Space

2007-11-08 14:21:17 · 6 answers · asked by Anonymous in Zoology

Aren't the blood vessels supposed to dilate and thus cause low blood pressure? I'm a little confused..Enlighten me, please.

2007-11-08 14:17:31 · 2 answers · asked by simpletruth 1 in Medicine

i would be a squire the are cool

2007-11-08 14:16:31 · 6 answers · asked by heroe 1 in Zoology

I don't really understand, please help!

Thank you :)

2007-11-08 14:15:33 · 4 answers · asked by Anonymous in Biology

Its a word problem.

an 18 inch by 20 inch sheet of cardboard is cut and folded to make a box for the great pecan company.
a. write a polynomial funtion to model the volume of the box.

how can i graph this?

c. the company wants the box to have a volume of 224 cubic inches. write an equation to model this situation.
d. find a positibe integer for x.

2007-11-08 14:12:38 · 1 answers · asked by Anonymous in Mathematics