Science & Mathematics - 12 November 2007

http://news.yahoo.com/s/space/20071112/sc_space/newmeasurementstheuniverseweighsless

It seems everyone can lose weight (except for me) from Kirstie Alley to my boss to Valerie Bertanelli and now the Universe!

I'm bummed.

2007-11-12 05:00:45 · 10 answers · asked by PediC 5 in Astronomy & Space

Is there life out there in space i mean its a massive place, perhaps there is life out there in same predictment as mankind unable to travel vast distances across the universe or maybe they are highly intelligent and just leave us to evolve as a species as this would be ethically right? what do you think?

2007-11-12 04:59:20 · 8 answers · asked by Anonymous in Astronomy & Space

3) 2x + 3y = 5
5x - 2y = -16


4) 10x + 5y = 2 1/2
7x - 2y = 1/10









Please explain how do solve these plus answers


Thanks :)

2007-11-12 04:58:36 · 7 answers · asked by Anonymous in Mathematics

I've seen the subs, so I only want the dubs please.

2007-11-12 04:57:32 · 1 answers · asked by sangovengence 2 in Physics

The inside diameters of the larger portions of the horizontal pipe in Figure P9.47 are 2.40 cm. Water flows to the right at a rate of 1.60 10-4 m3/s. Determine the inside diameter of the constriction.
http://www.webassign.net/sf/p9_47.gif

2007-11-12 04:55:28 · 1 answers · asked by Burton 1 in Physics

I was to run my electric outboard at 45 amps every hour. How long will it last and why?

2007-11-12 04:52:22 · 3 answers · asked by Anonymous in Engineering

2007-11-12 04:49:24 · 2 answers · asked by Mykhall 2 in Biology

The name may be misspelled but it definitely starts w/namo.

2007-11-12 04:48:35 · 3 answers · asked by vantastic13 1 in Zoology

Hello, I'm doing research for a chemistry report but I need to know why Nitrogen, Phosphorus and Potassium are included in most plant foods...

Can anyone answer why these ingredients are included in most plant food?

This will be my first question on yahoo answers... whoohoo

2007-11-12 04:46:16 · 2 answers · asked by Joe M 1 in Botany

2007-11-12 04:46:01 · 8 answers · asked by ☮ 5 in Biology

1) What force is necessary to drag a 20N box up a 45 degrees incline plane if the coefficient of friction is .47?

I think I understand some of this. Ff= Coefficient of Friction x Fn.
Coefficient of Friction: .47
W: 20N
Fn=W times Cos)Theta.
Fn=20N times Cos)45= 14N
Ff= Coefficient of Friction x Fn
Ff= .46 x 14N= 6.6N

This is where I got lost. Any help please?

2) The coeffient of a Sliding friction between a crate and a horizontal floor is .27. If the crate has a mass of 250kg, what force is needed to slide it across the floor at constant velocity?

I think I got this one.
Coefficient of Friction= .27
M: 250kg
W: 250kg x Gravity(9.81)= 2453N
Ff= Coefficient of Friction x W
Ff=2453N x .27= 662N

Thanks alot for those who helps.

2007-11-12 04:43:56 · 3 answers · asked by Lying from you 4 in Physics

this is an equasion for sensible heat, M is mass, delta t is the heat differences..... but C i cant make my head work.. thanks all

2007-11-12 04:41:24 · 6 answers · asked by Martin Q 2 in Engineering

Is it 5x squared or 6x or 6x squared?

2007-11-12 04:40:00 · 12 answers · asked by Jourdan----x 1 in Mathematics

i have to do an essay about russian population
i have done most of it but i can't find anyything to say what they are doing to try and increase the population.
please help me it's in for weds

thnx

2007-11-12 04:39:56 · 5 answers · asked by Anonymous in Geography

2007-11-12 04:38:44 · 6 answers · asked by ? 2 in Geography

Arrange the following atoms in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell.
K, Mg, Ti, Rh, P

2007-11-12 04:37:50 · 1 answers · asked by Anonymous in Chemistry

I got that it was symmetrical with respect to y = -x, but I'm pretty sure I'm wrong. Help, please :)

2007-11-12 04:37:38 · 3 answers · asked by winniemazing 2 in Mathematics

In an effort to not cheat on my test, I'm not going to post the actual question, but an example that if you solve could help me with the actual one. Don't give me a final answer, just a jump start I suppose. Thanks!

Find the point on the ellipse x^2 - 2xy + 6y^2 = 10 that is closest to the origin.

2007-11-12 04:35:46 · 4 answers · asked by euchred88 1 in Mathematics

2007-11-12 04:33:52 · 21 answers · asked by Smiley 1 in Paranormal Phenomena

2007-11-12 04:33:12 · 10 answers · asked by Michael M 1 in Zoology

during a baseball game, a batter hits a pop-up to a fielder 88 m away. the acceleration of gravity is 9.8m/s/s. if the ball remains in the air for 6.1seconds, how high does it rise? answer in units of meters.

2007-11-12 04:31:19 · 2 answers · asked by broncosfanatic09 1 in Physics

Enter a numeric answer only, no units.

2007-11-12 04:30:13 · 1 answers · asked by Anonymous in Chemistry

What is the value of x upon completion of the following statements?
int x,y,z;
x = 12;
y = 13;
z = 14;
if ( (z == 13) || (z > y)) {
x = x+3;
} else {
x = x+4;
}

2007-11-12 04:29:32 · 2 answers · asked by Nick L 1 in Mathematics

I just took a surprisingly easy multi test (my school isn't very smart) and I feel unsure about this question (ironically the most straightforward one).

Find the domain and range of e^(x-y).

I am 90% sure I got this right but I am retarded about e so can someone please assure me? Thanks in advance

2007-11-12 04:22:25 · 1 answers · asked by Mr. Chantastic 2 in Mathematics

Describe and give examples of proteins that have a variety of tertiary structures. Relate the tertiary structure of these proteins to their biological functions.

2007-11-12 04:20:10 · 2 answers · asked by Angie F 1 in Botany

also how many amps does your standerd (40 pounds thrust)electric outboard run at 12 volt

2007-11-12 04:18:52 · 2 answers · asked by Anonymous in Engineering

im doing a science fair project to test the five second rule. i want to count the bacteria that grows on the food after it was dropped. I will test 10 seconds 20 seconds 30 seconds and 40 seconds for each type of food. i just need to know how to count bacteria
The project will go SOMETHING LIKE this..
http://books.google.com/books?id=eoCPznKeBL8C&pg=PA26&lpg=PA26&dq=sciece+fair+5+second+rule&source=web&ots=Rzt7WoectM&sig=cM7tRhcX5-biD6txr4zNkd4t3AY#PPA27,M1

2007-11-12 04:13:57 · 1 answers · asked by thatgirlyouknow 1 in Botany

2007-11-12 04:13:27 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-12 04:11:23 · 4 answers · asked by a1cbch 1 in Engineering

2007-11-12 04:11:09 · 4 answers · asked by jason b 1 in Physics