Science & Mathematics - 24 September 2007

I am interested in finding out more about all thedifferent types of engineers.. Please help.. I need all the info I can get..

2007-09-24 11:48:21 · 5 answers · asked by Laura 1 in Engineering

4) Show that 6P4 = 6(5P3)
5) Show that nP5 - nP4 = (n-5)nP4
6) Solve for n: nP5 = 14(nP4)


How do I do these?

Thanks in advance

2007-09-24 11:47:37 · 1 answers · asked by Anonymous in Mathematics

choices are

a. non-loading
b. large
c. small
d. of low voltage drop

2007-09-24 11:42:17 · 3 answers · asked by Arabian 1 in Engineering

Im in physics and i was wondering how to find the mass of an object knowing only the objects height in meters and the gravitational potential energy?

2007-09-24 11:41:07 · 2 answers · asked by hawaiigrl 2 in Physics

I have no idea what this is asking. There are 16 problems askng for the mathematical meaning of different abbreviations (such as km, Mm, g, kL, cl, etc) and I don't know what do. Please help. Thank you!

2007-09-24 11:37:37 · 10 answers · asked by Anonymous in Chemistry

2007-09-24 11:32:57 · 2 answers · asked by Arabian 1 in Engineering

If a television or stereo is backed onto a window, will the sound of these devices travel more than if backed onto a solid wall?

2007-09-24 11:32:56 · 3 answers · asked by camelot 1 in Physics

The 75.8 kg pilot does not want his radial acceleration to exceed 10.3 grams.

a) What is the minimum radies of the circular path?

b) At this radius, what is the net centripetal force exerted on the pilot by the seat belts, the fricion between him and the seat, and so forth?

2007-09-24 11:29:56 · 1 answers · asked by alex v 1 in Physics

It's for my assignment, it's a simple question I know. But, I'm new at phys, lil' help please! .. ..It says, 'Using appropriate precision, perfomr the calculation. Include appropriate unit in answer.

That's all completely over my head. For now.

Thanks!

2007-09-24 11:29:53 · 1 answers · asked by robbi b 1 in Engineering

For all x is not = to 4,

x^2 - 8x + 16
___________
x^2 - 16

2007-09-24 11:29:43 · 3 answers · asked by blessed 1 in Mathematics

Determine k so that the equation x^2 -3x + K =0 has a double root

2007-09-24 11:24:54 · 2 answers · asked by Matt S 1 in Mathematics

What the advantages of analog modulation over digital modulation, and what are the disadvantages of anlog modulation?

2007-09-24 11:18:55 · 3 answers · asked by Lems B 1 in Engineering

If you were on a 31.2deg. slope and an avalanche started 409m up the slope, how much time would you have to get out of the way? Answer in sec.

Acceleration of gravity is 9.8 m/s^2

2007-09-24 11:18:16 · 1 answers · asked by alex v 1 in Physics

why won't this work?? what's wrong w/ the parameter??

> restart;
> with(Optimization);

[ImportMPS, Interactive, LPSolve, LSSolve, Maximize, Minimize,

NLPSolve, QPSolve]

> v:=hwl;

v := hwl

> Maximize(v,{h^2+l^2+w^2<=1}, h<1, w<1, l<1);
Error, (in Optimization:-NLPSolve) unexpected parameters: h < 1, w < 1, l < 1

=(

2007-09-24 11:17:55 · 1 answers · asked by tell me all!!! 4 in Mathematics

i just dont get it

2007-09-24 11:14:29 · 0 answers · asked by Raj 1 in Mathematics

Can someone give me a link to somewhere that I can hear and learn about sounds that the Canada goose makes. I need it soon!

2007-09-24 11:13:49 · 4 answers · asked by Anonymous in Zoology

A ball is thrown straight upward and returns to the thrower's hand after 2.88 s in the air. A second ball is thrown at an angle of 34.0 degrees with the horizontal. The acceleration of gravity is 9.81 m/s2 .

At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically? Answer in units of m/s.

2007-09-24 11:13:26 · 1 answers · asked by fatiimaq08 3 in Physics

Name one of the 8 different Biomes. List a characteristic and an oranism that would decribe the biome.

Boime:

Characteritic:

Organism:

2007-09-24 11:11:55 · 2 answers · asked by gracie 1 in Earth Sciences & Geology

How many square miles of solar panels would be necessary to power the entire country? If you have supporting information it would be most appreciated.

2007-09-24 11:11:55 · 2 answers · asked by David L 2 in Engineering

36x^2 + 6x

4x^2 + 9x


im just not sure what the question means and there is like 30 questions so dont say i have people doing my HW.

Thanks

2007-09-24 11:11:12 · 4 answers · asked by Anonymous in Mathematics

Ideas?
And how to write a good lab report!?
I need a solid idea for it that is exciting and scientific at the same time (and reasonable) (i dont have acess to chemicals)

2007-09-24 11:10:07 · 1 answers · asked by Anonymous in Chemistry

it's been said that kangeroos are being overpopulated for the area and that area's vegetation is almost ruined. They want to cull the kangeroos because they are coming into urban areas, and dog has been reported to be killed by a kangeroo.

Aside from whether it is moral or not, what is so bad about it? In the ecological aspect when there are too many kangeroos or ( certain wildlife).

2007-09-24 11:08:44 · 2 answers · asked by Fred 1 in Zoology

Describe a stone wall in the country or in a park using the following words: environment, interaction, abiotic, biotic

2007-09-24 11:07:42 · 1 answers · asked by gracie 1 in Earth Sciences & Geology

2007-09-24 11:07:03 · 2 answers · asked by rafael t 1 in Biology

31 N ,48 E WHAT IS THE NAME OF THE COUNTRY OR STATE

2007-09-24 11:04:58 · 4 answers · asked by Shirley P 1 in Geography

Which one's are parabolas and solve for the parabolas
1.) 4x^2+4y^2+36y+5=0
2.) 6x= y^2-6y+39
3.)y=x^2-6x+33

PUT IT IN THIS FORM y=a(x-h)^2+k or x=a(y-k)^2+h
(Whichever one is the one your supposed to use)

2007-09-24 11:02:45 · 1 answers · asked by Zoology 1 in Mathematics

Express the area A of an isoceles right triangle as a function of the length x of one of the two equal sides.

2007-09-24 10:58:47 · 5 answers · asked by journey 1 in Mathematics

shouldn't our moon have a name too? if u could name it anything u wanted what would it be?

2007-09-24 10:57:05 · 7 answers · asked by j.c. 3 in Astronomy & Space

2007-09-24 10:55:16 · 2 answers · asked by wyfh 2 in Biology

2007-09-24 10:54:05 · 6 answers · asked by magnolia 4 in Mathematics